KR101621682B1 - An apparatus for a bad smell reflux prevention - Google Patents

An apparatus for a bad smell reflux prevention Download PDF

Info

Publication number
KR101621682B1
KR101621682B1 KR1020160025394A KR20160025394A KR101621682B1 KR 101621682 B1 KR101621682 B1 KR 101621682B1 KR 1020160025394 A KR1020160025394 A KR 1020160025394A KR 20160025394 A KR20160025394 A KR 20160025394A KR 101621682 B1 KR101621682 B1 KR 101621682B1
Authority
KR
South Korea
Prior art keywords
housing
screw
rotation
spring
chamber
Prior art date
Application number
KR1020160025394A
Other languages
Korean (ko)
Inventor
서재식
Original Assignee
주식회사 에스엠지
서재식
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 주식회사 에스엠지, 서재식 filed Critical 주식회사 에스엠지
Priority to KR1020160025394A priority Critical patent/KR101621682B1/en
Application granted granted Critical
Publication of KR101621682B1 publication Critical patent/KR101621682B1/en

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/042—Arrangements of means against overflow of water, backing-up from the drain
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0407—Floor drains for indoor use
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/041—Accessories therefor

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

[0001] The present invention relates to a deodorizing device, and more particularly, to a deodorizing device comprising: a housing having an upper portion formed with an engagement protrusion and a drain passage formed therein; And a rotation operation part having a rotation operation part formed at the center of the housing through a filter plate formed in a plurality of inner circumferences of the housing and having an upper side opened and forming a housing space therein, room; An airtight jaw formed on the inner periphery of the housing; A screw which is formed on an outer periphery of a thread engaging with a screw thread of a rotary actuating part provided in the operating chamber and is operated to move up and down while being rotated; and a spring installed in the accommodating space of the operating chamber to elastically support the upper portion of the screw A rotating up / down means; A blocking ball which is disposed on the lower side of the operation chamber so as to open and close the drainage passage of the housing and is attached to the lower end of the screw and is brought into close contact with the airtight jaw by the elastic force of the spring constituted by the rotation lift- And a cover coupled to an upper portion of the operation chamber to seal the accommodation space.

Description

[0001] The present invention relates to an odor-

The object of the present invention is to provide a deodorizing device which is capable of preventing the backflow of the odor by preventing the foreign matter introduced into the blocking ball from sticking or sticking together with the water through the rotation of the blocking ball, It is possible to facilitate the rotation and elevation of the blocking ball regardless of the compressive force of the spring which is compressed according to the load of the water, thereby preventing clogging of the water drainage, The present invention relates to an odor shielding device which facilitates discharge of water and induces smooth rotation of ball bearings to prevent malfunction due to opening and closing of a drain passage.

In recent years, there has been a problem that the odor is backward or the insect such as mosquitoes invades even in the summer, and even in the winter, in the case of indoors, and thus the health and hygiene safety caused by the smell and the insect has many adverse effects on the comfortable life In fact there is.

Accordingly, various methods have been used such as installing an odor eliminating device such as an ozone generator, an odor eliminating device using an air blower or a filter as an auxiliary facility, or performing repair work. However, such a method is not only complex in equipment, It is common to leave it as it is, and there is a disadvantage in that the quality of life deteriorates.

In order to solve such a problem, the applicant of the present invention has proposed an apparatus for preventing backflow of odor of sewage, such as that of Patent Document 10-1037772, a device for preventing backflow of odors for sewage, And "a device for preventing odor reflux" as disclosed in Publication No. 20-0473414, and it has become possible to improve the quality of life.

Registered Patent Publication No. 10-1037772 (2011.05.23.) "Device for preventing odor backflow in sewer" - SM Co., Ltd. Registration Practical Newspaper Bulletin No. 20-0462476 (2012.09.06.) "Smoke Prevention Device for Sewer Sewage - SMG Co., Ltd. Registration Utility Model No. 20-0473414 (Apr. 26, 2014) "Device for Preventing Backflow of Odor" - SM Co., Ltd.

However, in the above-described conventional technologies, the water is discharged and the odor is cut off by the simple lifting operation by the pressure of the water to be drained, so that there is a problem that the foreign matter is caught or adhered to the odor- Therefore, there is a problem that the backflow of the odor can not be blocked due to insufficient airtightness due to the odor barrier ball.

That is, when the conventional odor backflow prevention device is installed in a granulation line of a high-rise building such as an apartment or a drainage port of a toilet, it is difficult to separate the backflow prevention device from the odor backflow prevention device.

Thus, the applicant of the present invention has developed a deodorizing device that can prevent backflow of odor due to foreign substances by applying a rotational force to the odor-blocking balls that are operated to move up and down.

An object of the present invention is to prevent a phenomenon in which foreign matter introduced together with water is caught or adhered to a blocking ball by making the blocking ball ascending and descending by the load of water when the water is drained interlocked by the rotation operation of the screw coupled to the rotation operating portion So that it is possible to block the back flow of the odor.

Further, according to the present invention, the pivotal movement of the pivotal elevating means is assisted by the pivoting auxiliary means including the first seat groove, the ball bearing and the second seat groove, And an object of the present invention is to provide an odor shielding device in which the ball can be easily turned and lifted and the water drainage is not clogged.

In addition, the present invention can easily discharge the water introduced into the operation chamber due to the water discharge portion connected to the first seating groove of the rotation assist means, And an object of the present invention is to provide a deodorizing device for preventing malfunctioning in opening and closing a drainage passage by inducing smooth rotation of a ball bearing that assists in rotation.

According to an aspect of the present invention, there is provided an air conditioner comprising: a housing having a latching protrusion formed on an outer side thereof and forming a drain passage therein; And a rotation operation part having a rotation operation part formed at the center of the housing through a filter plate formed in a plurality of inner circumferences of the housing and having an upper side opened and forming a housing space therein, room; An airtight jaw formed on the inner periphery of the housing; A screw which is formed on an outer periphery of a thread engaging with a screw thread of a rotary actuating part provided in the operating chamber and is operated to move up and down while being rotated; and a spring installed in the accommodating space of the operating chamber to elastically support the upper portion of the screw A rotating up / down means; A blocking ball which is disposed on the lower side of the operation chamber so as to open and close the drainage passage of the housing and is attached to the lower end of the screw and is brought into close contact with the airtight jaw by the elastic force of the spring constituted by the rotation lift- And a lid coupled to an upper portion of the operation chamber to seal the accommodation space.

When the deodorizing device of the present invention is used, the blocking ball, which is lifted and lowered by the load of water when the water is drained, is interlocked by the rotation operation of the screw coupled to the rotary operation portion. Therefore, There is no such phenomenon that the backflow of odor is blocked.

In addition, since the rotation assistance means is assisted by the rotation assisting means including the first seating groove, the ball bearing, and the second seating groove, regardless of the compression force of the spring which is compressed according to the load of the water, So that the water drainage is not clogged.

In addition, the present invention can easily discharge the water introduced into the operation chamber due to the water discharge portion connected to the first seating groove of the rotation assist means, The ball bearing that assists the rotation is point-contacted and smoothly rotates, which is a useful invention that prevents malfunctions in opening and closing the drainage passage.

Brief Description of the Drawings Fig. 1 is a perspective view partially showing a housing having an operating chamber and an airtight jaw portion according to the present invention. Fig.
Fig. 2 is an enlarged view of a portion A in Fig. 1; Fig.
3 is an exploded perspective view showing the odor shielding device of the present invention separated in section.
4 is a sectional view showing a state in which the drainage passage is closed by the odor shielding device of the present invention.
5 is a sectional view showing a state in which the drainage passage is opened by the odor shielding device of the present invention.

Hereinafter, the structure of the present invention will be described.

As shown in FIGS. 1 to 5, the present invention relates to an odor shielding device 100 for preventing backflow of odors by being installed in a drainage line, a drainage pipe, a granulation line of a high-rise building such as an apartment or a drainage pipe of a toilet, An air chamber 10, a working chamber 20, an airtight jaw 30, a rotation elevating means 40, a blocking ball 50 and a lid 60.

First, the housing 10 is configured to install the present invention in a drainage pipe or a drain pipe. The drainage passage 13 for draining water is formed in the housing 10, and a latching jaw 11, which is seated on a drainage pipe or a drain pipe, .

The operation chamber 20 is formed at the center of the housing 10 for the installation of the rotation and elevating means 40. The operation plate 20 includes a plurality of filter plates 21 formed on the inner periphery of the housing 10, And is formed integrally with the center of the interior of the housing 10 through an opening on the upper side to form a receiving space 23 therein.

A rotation operation part 27 is formed in the lower part of the accommodation space 23 to rotate the cut-off ball 50, which operates according to the load of the water, through the coupling with the rotation driving means 40. To this end, , And a threaded hole (25) is formed in the rotary operation part (27).

The airtight jaw 30 is configured to open or close the drainage passage 13 of the housing 10 through the sealing of the blocking ball 50 which is formed on the inner periphery of the housing 10 and which is operated to move up and down by a load of water But it is preferable that it is integrally formed with the housing 10 in order to facilitate the manufacture and reduce the cost. In the lower inner corner, a close contact area with the blocking ball 50 Is formed in a circular arc shape.

Fourth, the pivoting and elevating means 40 has a structure in which the deodorizing ball, which is operated to ascend and descend by the load of water, is rotated simultaneously with the lifting and lowering operation. The pivoting operation portion 27, And a screw (43) that is raised and lowered while rotating while forming a screw thread (41) coupled to the threaded hole (25) of the screw thread (25).

The spring 45 is configured to automatically close the drainage passage 13 through the cut-off ball 50 by returning the downwardly moving screw 43 to the rotary movement means 40, The spring 45 is a known construction, and the spring 45 is installed to elastically support the upper portion of the screw 43.

In order to achieve this, a support portion 47 to which a spring 45 is elastically supported is formed on the upper portion of the screw 43. In the present invention, the support portion 47 is fixed to the upper portion of the screw 43 The supporting portion 47 is formed with a fitting groove 47a through which a spring 43 is inserted so that the rotation of the spring 45 is adversely affected .

In the meantime, it is preferable that the present invention further includes a rotation auxiliary means (400) for assisting the rotation operation of the rotation driving means (40) so as to prevent a malfunction in opening and closing the drainage passage (13).

As described above, the rotation assisting means 400 is provided inside the operation chamber 20 so as to assist the rotation operation of the rotation driving means 40, A first seating groove 410 formed on the upper surface of the first seating groove 410 and a plurality of ball bearings 420 seated on the first seating groove 410 and a second seating corresponding to the first seating groove 410, And a tilting ring 430 formed in the groove 431 and seated on the ball bearing 420 to support the lower portion of the spring 45.

It is preferable that an insertion groove 433 for inserting a spring 45 is formed on the upper surface of the rotation ring 430 directly supporting the lower part of the spring 45. According to the insertion groove 433, Since the spring 45 that is rotated by the elastic operation does not occur, the operation of the rotation driving means 40 is smoothly performed.

The rotation of the screw 43 is interlocked with the rotation of the spring 45 so that the blocking ball 50 is rotated regardless of the compressive force of the spring 45 compressed according to the load of the water, And thus the clogging of the water drainage passing through the drainage passage 13 is prevented.

As described above, the rotation operation portion 27 of the operation chamber 20 is provided with the anti-corrosive function of the spring 45 provided in the rotary elevating means 40 and the smooth operation of the ball bearing 420 provided in the rotation assist means 400 And a water discharge portion 26 for discharging the water.

The water discharging portion 26 includes a channel 26a formed in a ring shape to be connected to each of the plurality of first seating grooves 410 and a channel 26b extending in the vertical direction of the channel 26a to penetrate the rotation operating portion 27 And the discharge holes 26b are formed at equal intervals in the flow path 26a so as to discharge the water more easily.

Therefore, even if water flows into the operation chamber 20 by the screw 43 that is operated to move up and down while rotating, the introduced water flows into the first seating groove 410, the flow path 26a, and the discharge hole 26b So that corrosion and resistance can be prevented. Accordingly, the smooth operation of the present invention can be continuously maintained.

It is preferable that the first and second seating grooves 410 and 431 of the auxiliary rotation means 400 further include contact protrusions 410a and 431a for point contact of the ball bearing 420, The ball bearing 420 that assists the rotation of the rotation raising and lowering means 40 smoothly rotates in the first and second seating grooves 410 and 431 through the pointed contact so that malfunction And has an action and effect to be prevented.

Fifthly, the blocking ball 50 is arranged below the operation chamber 20 to be connected to the lower end of the screw 43 so as to open and close the drainage passage 13 of the housing 10, It is preferable that the upper half portion 51 and the lower half hem 52 are combined.

The blocking ball 50 operates in conjunction with the screw 43 which moves up and down according to the load of the water, so that the blocking ball 50 performs the elevating operation and the rotating operation at the same time.

Therefore, a phenomenon that foreign matter introduced together with water does not get caught or adhered to the blocking ball 50 does not occur.

When the water is completely discharged and the load caused by water is lost, the blocking ball 50 is moved up by the elastic force of the spring 45 formed on the pivoting elevating means 40 and is brought into close contact with the airtight jaw 30 As described above, since the blocking ball 50 is prevented from being caught or pressed against foreign matter, the drainage passage 13 is completely closed and the backflow of the odor is prevented.

Sixth, the lid 60 is connected to the upper portion of the operation chamber 20 to seal the accommodation space 23 so that the upper opening of the operation chamber 20 is covered. And functions to prevent the water passing through the water discharge passage 13 from flowing into the accommodation space 23 by being coupled from the upper side to the lower side.

Hereinafter, the operation according to the preferred configuration of the present invention will be described.

First, when the water to be drained flows into the drainage passage 13 of the present invention, water is filled in the upper part of the blocking ball 50, and the blocking ball 50 is operated to descend by the load of water.

The lowering operation of the blocking ball 50 is performed by driving the rotating and elevating means 40. The load of water is transmitted to the blocking ball 50 and pulled downward by the rotating and elevating means 40 The screw 43 of the rotating and elevating means 40 rotates while being lowered in the process of passing through the rotary operation portion 27 forming the threaded bore 25.

Therefore, the blocking force of the shut-off ball 50, which is operated in conjunction with the screw 43, is also generated, so that the foreign matter contained in the water does not come into contact with the blocking ball 50.

When the drainage passage 13 is opened through the lowering operation of the blocking ball 50 as described above, the spring 45 is compressed in accordance with the lowering operation of the screw 43, The rotation of the screw 43 is stopped by the rotation assist unit 400 installed in the operation chamber 20 and supported by the spring 45, So that the rotation and elevation of the rotating and elevating means 40 do not interfere with each other. As a result, the drainage of the water due to the lowering operation of the blocking ball 40 is smoothly performed.

The ball bearing 420 constituting the rotation assist unit 400 is point-contacted via the first and second contact protrusions 410a and 431a formed in the first and second seating grooves 410 and 431, Can smoothly maintain the operation of the present invention even after continuous use. Therefore, it is possible to smoothly maintain the operation of the present invention even if the malfunction due to the opening and closing of the water discharge passage 13 is performed without any maintenance .

In addition, when the water drainage is completed and no load is applied to the blocking ball 50, the blocking ball 50 is moved upward by the elastic returning force of the spring 45 constituted by the rotating and elevating means 40, The blocking ball 50 is moved upwardly while being smoothly rotated by the rotation elevating and lowering means 40 and the rotation assisting means 400 so that the blocking ball 50 can be completely removed Therefore, the airtight jaw 30 can be surely sealed, and the backflow of the odor can be completely blocked.

10: housing 11: latching jaw 13: drainage passage
20: operating chamber 21: manure plate 23: accommodation space 25: threaded portion 26: water discharge portion 26a: flow passage 26b: discharge hole 27:
30: airtight jaw
40: rotation elevating means 41: thread 43: screw 45: spring 47: supporting portion 47a:
The present invention relates to a ball bearing and a ball bearing, and more particularly,
50: blocking ball 51: upper half 52: lower hemisphere
60: cover 100: deodorizing device

Claims (5)

A housing 10 forming an engagement protrusion 11 at an upper portion of the outer side and forming a drainage passage 13 therein;
The housing 10 is formed at the center of the housing 10 through a plurality of filtering plates 21 formed on the inner circumference of the housing 10 and has an upper side opened to form a receiving space 23 therein, A working chamber 20 having a rotary operation portion 27 for forming a thread 25 on the inner periphery thereof;
An airtight jaw 30 formed on the inner periphery of the housing 10;
A screw 43 which is formed on the outer periphery of a screw thread 41 coupled to the threaded boss 25 of the rotary actuating part 27 provided in the operation chamber 20 and is operated to move up and down while rotating, A rotation elevating means (40) provided in the accommodation space (23) and composed of a spring (45) for elastically supporting the upper part of the screw (43) located in the accommodation space (23);
A spring 45 disposed on the lower side of the screw 43 and connected to the lower end of the screw 43 so as to be able to open and close the drainage passage 13 of the housing 10, A blocking ball 50 which is brought into close contact with the airtight jaw 30 by means of the blocking ball 50;
And a lid (60) coupled to an upper portion of the operation chamber (20) to seal the accommodation space (23).
And a rotating auxiliary means (40) provided inside the operating chamber (20) for assisting rotation operation of the rotating and elevating means (40) composed of a screw (43) and a spring (45) (400), characterized in that the odor control device
3. The apparatus according to claim 2, wherein the rotation assist means (400)
A first seating groove 410 formed in the rotary operation portion 27 of the operation chamber 20;
A ball bearing 420 that is seated in the first seating groove 410;
A second seating groove 431 corresponding to the first seating groove 410 is formed so as to be seated on the ball bearing 420 and has an upper surface formed with an insertion groove 433 into which a spring 45 is inserted, 430). ≪ / RTI >
4. The rotary compressor according to claim 3, wherein the rotary actuating part (27) of the operating chamber (20) is provided with a ring-shaped passage (26a) connected to the first seating groove (410) Further comprising a water discharge portion (26) made up of a discharge hole (26b) formed in a vertical direction of the discharge port (26a).
4. The ball bearing according to claim 3, wherein contact protrusions (410a, 431a) for point contact of the ball bearings (420) are further included in the first and second seating grooves (410, 431) .
KR1020160025394A 2016-03-03 2016-03-03 An apparatus for a bad smell reflux prevention KR101621682B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160025394A KR101621682B1 (en) 2016-03-03 2016-03-03 An apparatus for a bad smell reflux prevention

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160025394A KR101621682B1 (en) 2016-03-03 2016-03-03 An apparatus for a bad smell reflux prevention

Publications (1)

Publication Number Publication Date
KR101621682B1 true KR101621682B1 (en) 2016-05-31

Family

ID=56099209

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160025394A KR101621682B1 (en) 2016-03-03 2016-03-03 An apparatus for a bad smell reflux prevention

Country Status (1)

Country Link
KR (1) KR101621682B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106499036A (en) * 2016-12-07 2017-03-15 马建山 Water return preventing floor drain
CN106703163A (en) * 2016-12-07 2017-05-24 马建山 Floor drain
CN112064760A (en) * 2020-09-12 2020-12-11 徐影影 Assembled anti-reverse-water floor drain and assembling method
CN113026915A (en) * 2021-04-12 2021-06-25 临沂振东建设投资有限公司 Disposable embedded floor drain for drainage of constructional engineering and construction method
US11846093B2 (en) 2020-09-15 2023-12-19 Joe Pasquesi Waterless floor drain trap valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002524674A (en) 1998-09-03 2002-08-06 キム，ジョン，サン Sewage ditch backflow prevention device
KR101415336B1 (en) 2014-04-02 2014-07-04 서재식 A drain trap
KR101545314B1 (en) 2015-01-22 2015-08-21 주식회사 에스엠지 A slip type sink trap

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002524674A (en) 1998-09-03 2002-08-06 キム，ジョン，サン Sewage ditch backflow prevention device
KR101415336B1 (en) 2014-04-02 2014-07-04 서재식 A drain trap
KR101545314B1 (en) 2015-01-22 2015-08-21 주식회사 에스엠지 A slip type sink trap

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106499036A (en) * 2016-12-07 2017-03-15 马建山 Water return preventing floor drain
CN106703163A (en) * 2016-12-07 2017-05-24 马建山 Floor drain
CN106703163B (en) * 2016-12-07 2019-04-12 新昌县佛虑机械配件厂 A kind of floor drain
CN106499036B (en) * 2016-12-07 2019-04-19 台山市戴隆塑料制品有限公司 Water return preventing floor drain
CN112064760A (en) * 2020-09-12 2020-12-11 徐影影 Assembled anti-reverse-water floor drain and assembling method
CN112064760B (en) * 2020-09-12 2021-09-24 苏州骊赫信息科技有限公司 Assembled anti-reverse-water floor drain and assembling method
US11846093B2 (en) 2020-09-15 2023-12-19 Joe Pasquesi Waterless floor drain trap valve
CN113026915A (en) * 2021-04-12 2021-06-25 临沂振东建设投资有限公司 Disposable embedded floor drain for drainage of constructional engineering and construction method

Similar Documents

Publication Publication Date Title
KR101621682B1 (en) An apparatus for a bad smell reflux prevention
KR101415336B1 (en) A drain trap
KR100875473B1 (en) Roof drain device for protection against the reek of sewage and backwater
US20120023650A1 (en) Toilet odor removal apparatus
US20090044320A1 (en) Self-ventilating toilet
JP2007224529A (en) Drain valve
KR101264017B1 (en) Drain open/close control apparatus for having a function of protection against the reek of sewage and backflow
KR101162105B1 (en) Drain device for preventing smell and reverse flow
US8984676B2 (en) Toilet with an odor eliminating function
KR102356646B1 (en) Air admittance valve for sewage pipes of buildings
KR200462476Y1 (en) An apparatus for a bad smell reflux prevention from drainage hole
KR100701785B1 (en) Trap installed atdrain pipe for preventing bad smell in an apartment house
CA2791057A1 (en) Part of toilet bowl for removing foul odor of excrement
KR101121930B1 (en) Drain device for preventing smell and reverse flow
EP2224067A1 (en) Device for eliminating odours for flush type sanitary fittings
KR100756933B1 (en) Apparatus for protection of odor treatment
JPH0853910A (en) Trap for floor drain
KR101273417B1 (en) Sewer of flowing backward protection type pass through apartmentveranda
CN212358529U (en) Adjustable water seal type deodorant floor drain
EP3507427B1 (en) Shower drain fitting
KR20130122061A (en) Drain trap
CN205369500U (en) Prevent outside floor drain that discharges of peculiar smell
CN219638083U (en) Deodorant core of sewer pipe
KR20170022309A (en) Open and shut adjusting drain trap by buoyancy
KR101729772B1 (en) Over Flow Protection Apparatus for Apartment House

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20190507

Year of fee payment: 4