EP4222337A1 - Low stress cavity exit for conically connecting drill bit - Google Patents

Low stress cavity exit for conically connecting drill bit

Info

Publication number
EP4222337A1
EP4222337A1 EP21786207.7A EP21786207A EP4222337A1 EP 4222337 A1 EP4222337 A1 EP 4222337A1 EP 21786207 A EP21786207 A EP 21786207A EP 4222337 A1 EP4222337 A1 EP 4222337A1
Authority
EP
European Patent Office
Prior art keywords
drill bit
section
region
curved
transition section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21786207.7A
Other languages
German (de)
French (fr)
Other versions
EP4222337B1 (en
Inventor
Conny Kraft
Tomas Jansson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik Mining and Construction Tools AB
Original Assignee
Sandvik Mining and Construction Tools AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandvik Mining and Construction Tools AB filed Critical Sandvik Mining and Construction Tools AB
Publication of EP4222337A1 publication Critical patent/EP4222337A1/en
Application granted granted Critical
Publication of EP4222337B1 publication Critical patent/EP4222337B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like

Definitions

  • the present invention relates to a rock drill and, more particularly, to a rock drill for use in percussion rock drilling comprising a drill bit having a first conical surface adapted for connection to a drill rod having a corresponding second conical surface.
  • drill bits are connected to a drill rod by means of a threaded connection or conical frictional connection.
  • the drill bit In the case of the conical frictional connection, otherwise known as a taper joint, the drill bit has a generally conical cavity while the end of the drill rod that should be received in the cavity is generally conical.
  • the exit of conical cavity of the drill bit has the form of a straight line with a chamfer.
  • the problem with this is that high stresses are formed at the exit of the cavity in the drill bit, which increases the risk of fracture of the drill bit in the region which consequently reduces the lifetime of the drill bit. If the drill bit fractures the percussive shock wave forces may no longer be transmitted to the rock but instead may loosen the firm connection between the drill bit and the drill rod, which could result in the drill bit spinning or even becoming detached and lost in the drill hole.
  • the problem to be solved is how to reduce stress in the drill bit in the region of the exit of the conical cavity in order to increase the performance and lifetime of the drill bit.
  • a percussive drill bit comprising a sleeve section and bit section having a longitudinal axis; wherein the sleeve section has an axial end at the opposing end of the drill bit compared to the bit section from which a generally conically shaped internal cavity extends from for receiving a conically shaped drill rod to form a conical frictional connection; characterised in that: the internal cavity has a transition section extending between the axial end of the drill bit and the a straight tapered region; wherein the transition section has at a first curved region having a first radius, TRi, wherein its tangent, TTi, to a central point along the first curved transition section is positioned at a first distance, TDi, from the axial end.
  • the inclusion of the curved transition section reduces the stress in the region of the exit of the conical cavity of the drill bit. This means the drill bit is less likely to fracture, which reduces the risk of the frictional connection being loosened. Consequently, the lifetime of the drill bit is increased, the risk of the bit spinning with respect to the drill rod or becoming detached from the drill rod is reduced.
  • the transition section additionally has a second curved section having a second radius, TR2, wherein its tangent, TT2, to a central point along the second curved transition section is positioned at a second distance, TD2, from the axial end; wherein TD2 > TDi and TR2 > TRi.
  • TR2 second radius
  • TDi second distance
  • TRi is between 0.1 - 1.5.
  • this provides an optimal balance between providing a tight connection between the conical rod and the conical cavity of the drill bit and also achieving a reduction in stress.
  • TD2 is between 0.5 - 5.0 mm.
  • this reduces the stress in the exit region of the cavity.
  • TRi is between 0.1 - 1.0 mm.
  • this provides optimal stress reduction.
  • the first curved region connects directly to the second curved region.
  • this design has low levels of the stress in the region of the exit of the conical cavity of the drill bit.
  • Figure 3 Enlargement of the transition section according to one embodiment wherein the transition section has two radii wherein the first curved transition region and the second curved transition region are directly connected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

A percussive drill bit comprising a sleeve section and bit section having a longitudinal axis; wherein the sleeve section has an axial end at the opposing end of the drill bit compared to the bit section from which a generally conically shaped internal cavity extends from for receiving a conically shaped drill rod to form a conical frictional connection; characterised in that: the internal cavity has a transition section extending between the axial end of the drill bit and the a straight tapered region; wherein the transition section has at a first curved region having a first radius,TR1, wherein its tangent, TT, to a central point along the first curved transition section is positioned at a first distance, TD1 from the axial end.

Description

Low stress cavity exit for conically connecting drill bit
Technical field
The present invention relates to a rock drill and, more particularly, to a rock drill for use in percussion rock drilling comprising a drill bit having a first conical surface adapted for connection to a drill rod having a corresponding second conical surface.
Background
In percussive drilling, during drilling, drill bits are connected to a drill rod by means of a threaded connection or conical frictional connection. In the case of the conical frictional connection, otherwise known as a taper joint, the drill bit has a generally conical cavity while the end of the drill rod that should be received in the cavity is generally conical.
In known designs the exit of conical cavity of the drill bit has the form of a straight line with a chamfer. The problem with this is that high stresses are formed at the exit of the cavity in the drill bit, which increases the risk of fracture of the drill bit in the region which consequently reduces the lifetime of the drill bit. If the drill bit fractures the percussive shock wave forces may no longer be transmitted to the rock but instead may loosen the firm connection between the drill bit and the drill rod, which could result in the drill bit spinning or even becoming detached and lost in the drill hole.
US20070175671A1, GB-658631A and GB-860768A show traditional conical frictional connections know in the prior art.
Therefore, the problem to be solved is how to reduce stress in the drill bit in the region of the exit of the conical cavity in order to increase the performance and lifetime of the drill bit.
Summary
It is an objective of this invention to provide a novel and improved design that reduces the stress in the drill bit in the region of the exit of the conical cavity in a taper joint. This objective is achieved by providing a percussive drill bit comprising a sleeve section and bit section having a longitudinal axis; wherein the sleeve section has an axial end at the opposing end of the drill bit compared to the bit section from which a generally conically shaped internal cavity extends from for receiving a conically shaped drill rod to form a conical frictional connection; characterised in that: the internal cavity has a transition section extending between the axial end of the drill bit and the a straight tapered region; wherein the transition section has at a first curved region having a first radius, TRi, wherein its tangent, TTi, to a central point along the first curved transition section is positioned at a first distance, TDi, from the axial end.
Advantageously, the inclusion of the curved transition section reduces the stress in the region of the exit of the conical cavity of the drill bit. This means the drill bit is less likely to fracture, which reduces the risk of the frictional connection being loosened. Consequently, the lifetime of the drill bit is increased, the risk of the bit spinning with respect to the drill rod or becoming detached from the drill rod is reduced.
Preferably, the transition section additionally has a second curved section having a second radius, TR2, wherein its tangent, TT2, to a central point along the second curved transition section is positioned at a second distance, TD2, from the axial end; wherein TD2 > TDi and TR2 > TRi. Advantageously, the inclusion of two different radii provides a reduction in stress whilst maintaining sufficient contact between the conical rod and the conical cavity in the drill bit.
Preferably, TRi is between 0.1 - 1.5. Advantageously, this provides an optimal balance between providing a tight connection between the conical rod and the conical cavity of the drill bit and also achieving a reduction in stress.
Preferably, TD2 is between 0.5 - 5.0 mm. Advantageously, this reduces the stress in the exit region of the cavity.
Preferably, TRi is between 0.1 - 1.0 mm. Advantageously, this provides optimal stress reduction.
Optionally, the first curved region connects directly to the second curved region. Advantageously, this design has low levels of the stress in the region of the exit of the conical cavity of the drill bit.
Alternatively, the first curved region connects to the second curved region via a first straight section. Advantageously, this design has low levels of the stress in the region of the exit of the conical cavity of the drill bit.
Optionally, the transition section further comprises a third curved region having a third radius, TR3, wherein its tangent, TT3, to a central point along the third curved transition section is positioned at a third distance, TD3, from the axial end, wherein TD3 > TD2 and TR3 > TR2. Advantageously, this design has low levels of the stress in the region of the exit of the conical cavity of the drill bit. Optionally, additionally there is a curved connection section between the straight tapered region and the cylindrical region. Advantageously, this provides additional stress reduction in the cavity of the drill bit.
Brief description of the drawing
A specific implementation of the present invention will now be described, by way of example only, and with reference to the accompanying drawings:
Figure 1: Cross section of a drill bit having a conically shaped internal cavity.
Figure 2: Enlargement of the transition section according to one embodiment wherein the transition section has a single radius.
Figure 3: Enlargement of the transition section according to one embodiment wherein the transition section has two radii wherein the first curved transition region and the second curved transition region are directly connected.
Figure 4: Enlargement of the transition section according to one embodiment wherein the transition section has two radii wherein the first curved transition region and the second curved transition region of the transition section are connected via an intermediate straight section.
Figure 5: Enlargement of the transition section according to one embodiment wherein there is additionally a third curved transition region in the transition section.
Figure 6: Transition section according to one embodiment wherein there is additionally a curved connection section between the straight tapered region and the cylindrical region.
Figure 7: Stress image of the conical region of the prior art drill bit.
Figure 8: Stress image of the conical region of an inventive drill bit.
Detailed description
Figure 1 shows a cross section of a drill bit 2 comprising a sleeve section 4 and a bit section 6 which are integrated together. The sleeve section 4 has an internal cavity 8, having a generally conical shape, for receiving a conically shaped drill rod (not shown). The drill bit 2 has a longitudinal axis 30. The cavity 8 opens from an axial end 18 of the drill bit 2, furthest from the bit section 6. The cavity 8 has the largest cross-sectional diameter at the axial end 18 of the drill bit 2. The cavity 8 comprises a conical region 14 that tapers inwardly from the open axial end 18 to a cup-shaped cylindrical region 16 that terminates the cavity 8 and is positioned adjacent to the bit section 6. The conical region 14 comprises a straight tapered region 26 positioned adjacent to the cylindrical region 16 and a transition section 32 that is positioned in-between the axial end 18 of the drill bit 2 and the straight tapered section 26.
Figure 2 shows an enlargement of the drill bit 2 in the area of the transition section 32 according to one embodiment of the present invention. In this embodiment the internal surface 10 of the transition section 32 has a first curved transition section 20 having a first radius, TRi, wherein its tangent TTi to a central point along the first curved transition section 20 is positioned at a first distance, TDi, from the axial end 18 of the drill bit 2.
Figure 3 shows an alternative embodiment, enlarged in the same way as in figure 2, wherein the internal surface 10 of the transition section 32 has a first curved transition region 20 having a first radius, TRi, wherein its tangent TTi to a central point along the first curved transition section 20 is positioned at a first distance, TDi, from the axial end 18 of the drill bit 2 and a second curved transition region 22 having a second radius, TR2, wherein its tangent TT2 to a central point along the second curved transition section 22 is positioned a second distance, TD2, from the axial end 18 of the drill bit 2. In the present invention TD2>TDI and TR2 > TRi. TRi is between 0.1-1.5 mm, preferably between 0.1-1.0 mm. TR2 is between 20-300 mm, preferably between 35-200 mm. TD2 is between 0.5-5.0 mm, preferably between 1.5-2.5 mm. In this embodiment the first curved transition region 20 is directly connected to the second curved transition region 22 and the second transition region 22 is directly connected to the straight tapered region 26.
Figure 4 shows an alternative embodiment, enlarged in the same way as in figure 2, wherein the first curved transition region 20 is connected to the second curved transition region 22 via an intermediate straight section 34.
Figure 5 shows an alternative embodiment, enlarged in the same way as in figure 2, wherein the transition section 32 additionally comprises a third curved transition region 24. The third transition region 24 has a third radius, TR3, wherein its tangent, TT3, to a central point along the third curved transition section 24 is positioned at a third distance, TD3, from the axial end 18 of the drill bit 2, wherein TD3 > TD2. TR3 will be different to TRi and TR2, preferably TR3 > TR2. Optionally, the transition section 32 could also comprise more than three curved transition sections, each having a different radius. Each of the curved transition sections could either be directly connected to each other could be connected to each other via an intermediate straight section 34. Figure 6 shows an alternative embodiment wherein there is additionally a curved connection section 40 between the straight tapered region 26 and the cylindrical region 16.
Figure 7 shows the von Mises equivalent stress taken of the conical region 14 of a prior art drill bit wherein there is no curved transition region. Figures 8 shows the von Mises equivalent stress taken of the conical region 14 for an inventive drill bit, wherein there is transition section having a first and second curved transition regions. In the models one rod and one bit are included and the models are axi-symmetry. An axial load of 190 kN is applied on the end of the rod and the bit face is fully supported. An elastic material with Young's modulus of 206 GPa, Poisson's ratio of 0.3 and a volumetric mass density of 7800 kg/m3 were used. The implicit solver in LS-Dyna R10 were used to solve the models and the images of the von Mises equivalent stress were taken at the maximum load and HyperView 2019 were used as post-processor. It can be seen that the stress in exit region of the drill exit region of the cavity 8 is reduced for the inventive drill bit compared to the prior art drill bit.

Claims

Claims
1. A percussive drill bit (2) comprising a sleeve section (4) and bit section (6) having a longitudinal axis (30); wherein the sleeve section (4) has an axial end (18) at the opposing end of the drill bit (2) compared to the bit section (6) from which a generally conically shaped internal cavity (8) extends from for receiving a conically shaped drill rod to form a conical frictional connection; characterised in that: the internal cavity (8) has a transition section (32) extending between the axial end (18) of the drill bit (2) and a straight tapered region (26); wherein the transition section (32) has at a first curved region (20) having a first radius (TRi) wherein its tangent (TT) to a central point along the first curved transition section (20), is positioned at a first distance (TDi) from the axial end (18).
2. The percussive drill bit (2) according to claim 1 wherein the transition section (32) additionally has a second curved section (22) having a second radius (TR2) wherein its tangent (TT2) to a central point along the second curved transition section (22) is positioned at a second distance (TD2) from the axial end (18); wherein TD2 > TDi and TR2 > TRi.
3. The percussive drill bit (2) according to claim 1 or claim 2, wherein TRi is between 0.1 - 1.5.
4. The percussive drill bit (2) according to claim 2, wherein TD2 is between 0.5 - 5.0 mm.
5. The percussive drill bit (2) according to any of the proceeding claims, wherein TRi is between 0.1 - 1.0 mm.
6. The percussive drill bit (2) according to any of the proceeding claims, wherein the first curved region (20) connects directly to the second curved region (22).
7. The percussive drill bit (2) according to any of claims 1-5, wherein the first curved region (20) connects to the second curved region (22) via a first straight section (34).
8. The percussive drill bit (2) according to any of the proceeding claims, wherein the transition section (32) further comprises a third curved region (24) having a third radius (TR3) wherein its tangent (TT3) to a central point along the third curved transition section (24) is positioned at a third distance (TD3) from the axial end (18), wherein TD3 > TD2 and TR3 > TR2.
9. The percussive drill bit (2) according to any of the previous claims wherein additionally there is a curved connection section (40) between the straight tapered region (26) and the cylindrical region
EP21786207.7A 2020-09-30 2021-09-30 Low stress cavity exit for conically connecting drill bit Active EP4222337B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20199284.9A EP3978719A1 (en) 2020-09-30 2020-09-30 Low stress cavity exit for conically connecting drill bit
PCT/EP2021/076974 WO2022069652A1 (en) 2020-09-30 2021-09-30 Low stress cavity exit for conically connecting drill bit

Publications (2)

Publication Number Publication Date
EP4222337A1 true EP4222337A1 (en) 2023-08-09
EP4222337B1 EP4222337B1 (en) 2025-09-10

Family

ID=72709116

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20199284.9A Withdrawn EP3978719A1 (en) 2020-09-30 2020-09-30 Low stress cavity exit for conically connecting drill bit
EP21786207.7A Active EP4222337B1 (en) 2020-09-30 2021-09-30 Low stress cavity exit for conically connecting drill bit

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20199284.9A Withdrawn EP3978719A1 (en) 2020-09-30 2020-09-30 Low stress cavity exit for conically connecting drill bit

Country Status (3)

Country Link
EP (2) EP3978719A1 (en)
JP (1) JP7758731B2 (en)
WO (1) WO2022069652A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB658631A (en) 1949-01-01 1951-10-10 Hall & Pickles Ltd Improvements in percussive drill bits
GB860768A (en) 1958-04-04 1961-02-08 Electrochimie Electrometallurg Improvements in or relating to a method of manufacturing rock and like drills and tosuch drills
US3336081A (en) * 1965-08-02 1967-08-15 Samuel S Ericsson Percussion tool with replaceable point
US5685381A (en) * 1995-07-21 1997-11-11 Kennametal South Africa (Proprietary) Limited Drill rod and drill bit with rocking connection
DE29519484U1 (en) * 1995-12-08 1996-01-25 Drebo Werkzeugfabrik Gmbh, 88361 Altshausen drill
SE531412C2 (en) 2005-12-30 2009-03-31 Sandvik Intellectual Property Rock drilling tools, rock drill bit and method for manufacturing a conical cavity of a rock drill bit
JOP20170118B1 (en) * 2016-05-13 2020-08-27 Hensley Ind Inc Fixation features in the structure of organs subject to wear

Also Published As

Publication number Publication date
EP4222337B1 (en) 2025-09-10
WO2022069652A1 (en) 2022-04-07
JP2023543851A (en) 2023-10-18
EP3978719A1 (en) 2022-04-06
JP7758731B2 (en) 2025-10-22

Similar Documents

Publication Publication Date Title
US7185721B2 (en) Male portion, drill bit and threaded joint for percussive rock drilling
EP4222337B1 (en) Low stress cavity exit for conically connecting drill bit
KR102902169B1 (en) Drill string rod
US10087686B2 (en) Shank adaptor with strengthened flushing hole
EP4222338B1 (en) Low stress cavity for conically connecting drill bits
US20090065224A1 (en) Rock drilling tool
JP7774617B2 (en) Drill string joint design
EP4172455B1 (en) Thread clearance
RU2787856C1 (en) Drill string rod and drilling system
AU2021298830B2 (en) Thread clearance
OA20379A (en) Drill string rod.
OA21076A (en) Thread clearance.
WO2021089727A1 (en) Strengthened percussive drill string female coupling
BR112021018408B1 (en) DRILL STRING ROD AND SYSTEM COMPRISING DRILL STRING RODS

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230502

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20250414

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SANDVIK MINING AND CONSTRUCTION TOOLS AB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602021038385

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20250827

Year of fee payment: 5

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NO

Payment date: 20251027

Year of fee payment: 5

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20250910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251211

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20251210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1836065

Country of ref document: AT

Kind code of ref document: T

Effective date: 20250910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20260110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20260112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20250910

REG Reference to a national code

Ref country code: CH

Ref legal event code: H13

Free format text: ST27 STATUS EVENT CODE: U-0-0-H10-H13 (AS PROVIDED BY THE NATIONAL OFFICE)

Effective date: 20260504