EP0276232A1 - Vorrichtung zur behandlung des auges mit einem laser - Google Patents
Vorrichtung zur behandlung des auges mit einem laserInfo
- Publication number
- EP0276232A1 EP0276232A1 EP87904023A EP87904023A EP0276232A1 EP 0276232 A1 EP0276232 A1 EP 0276232A1 EP 87904023 A EP87904023 A EP 87904023A EP 87904023 A EP87904023 A EP 87904023A EP 0276232 A1 EP0276232 A1 EP 0276232A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser
- eye
- multiplier
- spots
- prisms
- 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.)
- Ceased
Links
- 238000013532 laser treatment Methods 0.000 title description 5
- 238000011282 treatment Methods 0.000 abstract description 10
- 230000005855 radiation Effects 0.000 abstract 1
- 238000009826 distribution Methods 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 206010012689 Diabetic retinopathy Diseases 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/008—Methods or devices for eye surgery using laser
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/008—Methods or devices for eye surgery using laser
- A61F2009/00861—Methods or devices for eye surgery using laser adapted for treatment at a particular location
- A61F2009/00872—Cornea
Definitions
- the invention relates to a device for treating the eye with a laser in accordance with the preamble of patent claim 1.
- Devices of this type are used, for example, for coagulation of the fundus with an argon laser, for treatments or for operations in the front sections of the eye with a neodymium-YAG laser or for radial keratotomy with an excimer or infrared laser .
- the invention is based on the object of specifying a device for treating the eye with a laser in which the time required for treatments in which a large number of laser spots have to be set is substantially reduced.
- a solution to this problem according to the invention is characterized by its developments in the claims.
- At least one beam multiplier is arranged in the beam path of the laser, which splits the beam of the laser into at least two partial beams.
- These partial beams have a certain spatial relationship to one another, i.e. for example, they have a certain angular distance from one another and a certain distance from the optical axis and are mapped together onto the area of the eye to be treated.
- the treatment time for example for larger fundus areas, is shortened by multiplying the laser spots in accordance with the number of laser spots, for example, the treatment time per laser shot is reduced by a factor of 10 when the laser beam is split into 10 partial beams.
- the beam multiplier used according to the invention can in principle be of any design.
- the beam multiplier can consist of a diffraction grating, a hologram, mirrors, a pair of plane lenses or a calcate prism, for example a so-called Wollaston prism.
- a particularly preferred embodiment of the beam multiplier is characterized in claim 2.
- a prism plate with radially arranged prisms is used as the beam multiplier.
- Such a prismatic plate has a number of advantages:
- the number of laser spots is given by the number of prisms and the spacing of the individual spots by the wedge angle.
- the power of the laser is divided among the individual spots.
- each laser spot generated by a prism has the same energy distribution over the spot diameter if the beam splitter prism is arranged in the parallel beam path of the laser.
- the energy distribution is also equal to the distribution that one. obtained if the laser beam is imaged without a beam multiplier.
- the prismatic plate If all prisms of the prismatic plate are of the same design, laser spots are obtained which are arranged equidistant from the optical axis and in which the same power is output in each case.
- the power of the laser beam can be divided differently between the individual laser spots by correspondingly different angular extent of the individual spots.
- the device according to the invention can not only be used to generate a series of laser beam spots which are arranged next to one another, but also, according to claim 8, to generate a comparatively large spot with almost homogeneous energy distribution by superimposing the individual laser beam spots which merge into one another .
- the beam multiplier according to the invention is therefore also suitable for spot size variation with the advantage that the power distribution in the enlarged spot no ⁇ Gaussian distribution, but a nearly "rechteckför--shaped distribution.
- FIG. 1 shows a device for laser treatment of the eye, in the beam path of which a beam multiplier is arranged
- FIG. 2a shows an exemplary embodiment of a beam multiplier according to the invention
- Figure 2b shows the laser spot arrangement
- FIG. 3 shows a further exemplary embodiment of a beam multiplier according to the invention.
- FIG. 1 shows a device for laser treatment of the eye, in which a laser beam (1) is reflected from below into the housing (2) of a slit lamp microscope (not shown in more detail). This laser beam is guided in a manner known per se as a parallel beam through the arm of the slit lamp microscope and is expanded by optical elements (not shown) before the part of the beam path shown.
- the reflected laser beam is focused by means of a mirror (3) and imaging optics (4) on the fundus of an eye to be treated, of which only one plane of focus (5) is indicated schematically.
- Figure 2a shows an embodiment of such a beam multiplier (6) in cross section or in supervision.
- the beam multiplier (6) consists of a small plane-parallel plate (7) with a circular contour, which is arranged in the optical axis (11) of the laser beam (1).
- FIG. 2b shows, part of the laser beam (1) passes through the plate (7) uninterrupted, while the rest of the laser beam is deflected by the prisms (81 ... 88) according to their wedge angle. This deflection is indicated schematically in FIG. 2a by two partial beams (1 ') and (1 ").
- Figure 2b shows the arrangement of laser spots, which results with the beam multiplier (6) shown in Figure 2a.
- nine laser beam spots (91) to (99) are obtained in the exemplary embodiment shown.
- the laser beam spot (91) is located in the optical axis (11) of the arrangement, while the spots (92) to (99) are mutually independent both from one another and from the optical axis (11).
- FIG. 3 shows a further exemplary embodiment of a beam multiplier according to the invention, which has prisms (81) to 88 with a wedge angle not equal to 0 ° and prisms (101), (102), (103) and (104) with the wedge angle "0 °" .
- These prisms do not influence the laser beam, so that this beam multiplier also results in a central laser spot in the optical axis 11 and 8 laser spots arranged around it, which are mutually constant and each have the same distance from the optical axis.
- the beam multiplier provided according to the invention cannot only be arranged according to FIG. 1; Of course, it is possible to guide it in the divergent, convergent or parallel beam path of any laser beam guide, for example a guide through or onto one Slit lamp to be provided.
- the individual laser beam spots can not only be discrete, spaced-apart spots, it is also possible for the individual spots to overlap. It is particularly advantageous if the individual spots are superimposed such that the superimposition of the individual laser light power distributions in the individual spot areas results in an almost homogeneous and rectangular power distribution over the entire spot area.
- the beam multiplier provided according to the invention is therefore also suitable for enlarging the laser beam spot with the advantage that a targeted influencing of the energy distribution in the enlarged laser beam spot is possible.
- the circular arrangement of the individual spots can be used: for example, it is possible to arrange the individual spots in such a way that a beam cross section that is particularly useful for radial keratotomy is obtained.
- the beam multiplier provided according to the invention does not have to consist of prisms. Rather, it is also possible to use a beam multiplier according to the invention Diffraction gratings, a hologram, mirrors, plane lens pairs or calcite prisms can be realized.
- the combination with a wobble lens can also be used to reproduce the laser spots again.
- a plurality of differently designed beam multipliers can also be arranged on a revolver or recoss disc, so that the different beam multipliers can optionally be swiveled into the beam path one after the other.
- treatment with a different number of spots and / or spot arrangement is or. 'treatment with ' different spot sizes of a large laser spot possible ' .
- a motorized control of Recoss disks enables programmable laser treatment with previous laser planning, an empty field in the Recoss disk allows conventional laser treatment with only a single laser spot.
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Optics & Photonics (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Laser Surgery Devices (AREA)
- Laser Beam Processing (AREA)
- Radiation-Therapy Devices (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3620744 | 1986-06-20 | ||
DE19863620744 DE3620744A1 (de) | 1986-06-20 | 1986-06-20 | Vorrichtung zur behandlung des auges mit einem laser |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0276232A1 true EP0276232A1 (de) | 1988-08-03 |
Family
ID=6303363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87904023A Ceased EP0276232A1 (de) | 1986-06-20 | 1987-06-20 | Vorrichtung zur behandlung des auges mit einem laser |
Country Status (5)
Country | Link |
---|---|
US (1) | US4884884A (de) |
EP (1) | EP0276232A1 (de) |
JP (1) | JPS63503521A (de) |
DE (1) | DE3620744A1 (de) |
WO (1) | WO1987007829A2 (de) |
Families Citing this family (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5484432A (en) * | 1985-09-27 | 1996-01-16 | Laser Biotech, Inc. | Collagen treatment apparatus |
US5137530A (en) * | 1985-09-27 | 1992-08-11 | Sand Bruce J | Collagen treatment apparatus |
US5152759A (en) * | 1989-06-07 | 1992-10-06 | University Of Miami, School Of Medicine, Dept. Of Ophthalmology | Noncontact laser microsurgical apparatus |
CA2141577A1 (en) * | 1992-08-03 | 1994-02-17 | David R. Hennings | Method and apparatus for exposing a human eye to a controlled pattern of radiation spots |
US5688264A (en) * | 1992-10-19 | 1997-11-18 | The University Of Miami | Laser treatment for retinal detachment |
DE4239073C1 (de) * | 1992-11-20 | 1994-04-21 | Aesculap Ag | Medizinisches Handstück |
US5480396A (en) * | 1994-12-09 | 1996-01-02 | Simon; Gabriel | Laser beam ophthalmological surgery method and apparatus |
US5921981A (en) * | 1995-11-09 | 1999-07-13 | Alcon Laboratories, Inc. | Multi-spot laser surgery |
US6193710B1 (en) * | 1998-07-16 | 2001-02-27 | Visx, Incorporated | Method for scanning non-overlapping patterns of laser energy with diffractive optics |
US6149643A (en) * | 1998-09-04 | 2000-11-21 | Sunrise Technologies International, Inc. | Method and apparatus for exposing a human eye to a controlled pattern of radiation |
IL133073A (en) * | 1999-11-22 | 2003-06-24 | Yaakov Amitai | Method and system for treating a target plane with a laser beam |
US6610050B2 (en) * | 2001-07-27 | 2003-08-26 | 20/10 Perfect Vision, Optische Geraete Gmbh | Laser beam delivery system with multiple focal points |
DE10157906A1 (de) * | 2001-11-26 | 2003-06-26 | Schwind Eye Tech Solutions Gmb | Vorrichtung und Verfahren zum Abtragen von Oberflächenmaterial |
US7766903B2 (en) | 2003-12-24 | 2010-08-03 | The Board Of Trustees Of The Leland Stanford Junior University | Patterned laser treatment of the retina |
US7618415B2 (en) * | 2004-04-09 | 2009-11-17 | Technolas Perfect Vision Gmbh | Beam steering system for corneal laser surgery |
US7452080B2 (en) * | 2004-06-10 | 2008-11-18 | Optimedica Corporation | Scanning ophthalmic fixation method and apparatus |
AU2005260743B2 (en) * | 2004-06-28 | 2009-01-29 | Optimedica Corporation | Method and device for optical ophthalmic therapy |
US7892225B2 (en) * | 2004-12-17 | 2011-02-22 | Technolas Perfect Vision Gmbh | Devices and methods for separating layers of materials having different ablation thresholds |
US20070129775A1 (en) | 2005-09-19 | 2007-06-07 | Mordaunt David H | System and method for generating treatment patterns |
US10524656B2 (en) | 2005-10-28 | 2020-01-07 | Topcon Medical Laser Systems Inc. | Photomedical treatment system and method with a virtual aiming device |
US20070121069A1 (en) * | 2005-11-16 | 2007-05-31 | Andersen Dan E | Multiple spot photomedical treatment using a laser indirect ophthalmoscope |
US9681985B2 (en) * | 2005-12-01 | 2017-06-20 | Topcon Medical Laser Systems, Inc. | System and method for minimally traumatic ophthalmic photomedicine |
US9889043B2 (en) | 2006-01-20 | 2018-02-13 | Lensar, Inc. | System and apparatus for delivering a laser beam to the lens of an eye |
US9545338B2 (en) | 2006-01-20 | 2017-01-17 | Lensar, Llc. | System and method for improving the accommodative amplitude and increasing the refractive power of the human lens with a laser |
US10842675B2 (en) | 2006-01-20 | 2020-11-24 | Lensar, Inc. | System and method for treating the structure of the human lens with a laser |
US8262646B2 (en) | 2006-01-20 | 2012-09-11 | Lensar, Inc. | System and method for providing the shaped structural weakening of the human lens with a laser |
US20070255119A1 (en) * | 2006-03-13 | 2007-11-01 | David Mordaunt | Separate computing device for medical device with computing capabilities |
US10098781B2 (en) | 2006-03-24 | 2018-10-16 | Topcon Medical Laser Systems Inc. | Multi-spot optical fiber endophotocoagulation probe |
US8771261B2 (en) * | 2006-04-28 | 2014-07-08 | Topcon Medical Laser Systems, Inc. | Dynamic optical surgical system utilizing a fixed relationship between target tissue visualization and beam delivery |
US10617564B1 (en) | 2006-05-10 | 2020-04-14 | Apple Inc. | Area scanning photomedicine device and method |
US8568393B2 (en) * | 2007-03-13 | 2013-10-29 | Topcon Medical Laser Systems, Inc. | Computer guided patterned laser trabeculoplasty |
US8500723B2 (en) | 2008-07-25 | 2013-08-06 | Lensar, Inc. | Liquid filled index matching device for ophthalmic laser procedures |
US8480659B2 (en) | 2008-07-25 | 2013-07-09 | Lensar, Inc. | Method and system for removal and replacement of lens material from the lens of an eye |
US8388609B2 (en) * | 2008-12-01 | 2013-03-05 | Amo Development, Llc. | System and method for multibeam scanning |
US8758332B2 (en) | 2009-07-24 | 2014-06-24 | Lensar, Inc. | Laser system and method for performing and sealing corneal incisions in the eye |
US8617146B2 (en) | 2009-07-24 | 2013-12-31 | Lensar, Inc. | Laser system and method for correction of induced astigmatism |
US8382745B2 (en) | 2009-07-24 | 2013-02-26 | Lensar, Inc. | Laser system and method for astigmatic corrections in association with cataract treatment |
CN102639078B (zh) | 2009-07-24 | 2015-10-21 | 能斯雅有限公司 | 一种为眼睛晶状体实施激光雷达辅助手术的系统和方法 |
EP2456384B1 (de) | 2009-07-24 | 2023-09-20 | LENSAR, Inc. | System zur bereistellung von laserschussmustern auf die augenlinse |
EP2531089B1 (de) | 2010-02-01 | 2023-04-05 | LENSAR, Inc. | Auf purkinjie-bildern basierende ausrichtung eines saugrings in augenärztlichen anwendungen |
DE102010022760A1 (de) * | 2010-06-04 | 2011-12-08 | Carl Zeiss Meditec Ag | Ophthalmologisches Gerät zur Photokoagulation oder Phototherapie und Betriebsverfahren für ein solches |
USD694890S1 (en) | 2010-10-15 | 2013-12-03 | Lensar, Inc. | Laser system for treatment of the eye |
ES2937241T3 (es) | 2010-10-15 | 2023-03-27 | Lensar Inc | Sistema y método de iluminación controlada por barrido de estructuras dentro de un ojo |
USD695408S1 (en) | 2010-10-15 | 2013-12-10 | Lensar, Inc. | Laser system for treatment of the eye |
US10463541B2 (en) | 2011-03-25 | 2019-11-05 | Lensar, Inc. | System and method for correcting astigmatism using multiple paired arcuate laser generated corneal incisions |
US8764188B2 (en) | 2011-10-21 | 2014-07-01 | Kent Tabor | Functional vision tester |
AU2018317499A1 (en) * | 2017-08-18 | 2020-02-27 | Ellex Medical Pty Ltd | Multi-spot ophthalmic laser |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3419321A (en) * | 1966-02-24 | 1968-12-31 | Lear Siegler Inc | Laser optical apparatus for cutting holes |
GB1405487A (en) * | 1972-09-26 | 1975-09-10 | Thorn Electrical Ind Ltd | Apparatus for treating workpieces with laser radiation |
US4443075A (en) * | 1981-06-26 | 1984-04-17 | Sri International | Stabilized visual system |
US4561436A (en) * | 1983-10-28 | 1985-12-31 | Cooper Lasersonics, Inc. | Optical system for surgical ophthalmic laser instrument |
US4565197A (en) * | 1983-11-22 | 1986-01-21 | Lasers For Medicine | Laser ophthalmic surgical system |
US4580559A (en) * | 1984-07-24 | 1986-04-08 | Esperance Francis A L | Indirect ophthalmoscopic photocoagulation delivery system for retinal surgery |
AU606315B2 (en) * | 1985-09-12 | 1991-02-07 | Summit Technology, Inc. | Surface erosion using lasers |
FR2594686B1 (fr) * | 1986-02-27 | 1988-05-13 | Cilas Alcatel | Dispositif pour effectuer une incision rectiligne dans un oeil a traiter |
-
1986
- 1986-06-20 DE DE19863620744 patent/DE3620744A1/de active Granted
-
1987
- 1987-06-20 WO PCT/DE1987/000279 patent/WO1987007829A2/de not_active Application Discontinuation
- 1987-06-20 US US07/162,322 patent/US4884884A/en not_active Expired - Fee Related
- 1987-06-20 JP JP62503728A patent/JPS63503521A/ja active Pending
- 1987-06-20 EP EP87904023A patent/EP0276232A1/de not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO8707829A2 * |
Also Published As
Publication number | Publication date |
---|---|
US4884884A (en) | 1989-12-05 |
DE3620744A1 (de) | 1987-12-23 |
WO1987007829A3 (fr) | 1988-04-07 |
DE3620744C2 (de) | 1989-08-24 |
JPS63503521A (ja) | 1988-12-22 |
WO1987007829A2 (en) | 1987-12-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0276232A1 (de) | Vorrichtung zur behandlung des auges mit einem laser | |
DE102007019812B4 (de) | Laserchirurgische Vorrichtung zur Augenbehandlung | |
EP1112524B1 (de) | Medizinisches handstück für laserstrahlungsquelle | |
DE19746483C5 (de) | Vorrichtung zur Formgebung von optischen Linsen durch Materialabtrag | |
DE4300698A1 (de) | Vorrichtung und Verfahren zur Handhabung, Bearbeitung und Beobachtung kleiner Teilchen, insbesondere biologischer Teilchen | |
DE4004423C2 (de) | Vorrichtung zur chirurgischen Behandlung der Ametropie | |
DE1566107B2 (de) | Optische vorrichtung zur koagulierung eng umgrenzter punktaehnlicher stellen der netzhaut des auges | |
DE4012927A1 (de) | Mess-verfahren und -vorrichtung zur dreidimensionalen lageregelung des brennpunktes eines hochenergie-laserstrahls | |
EP1180726A2 (de) | Beleuchtungssystem für die Mikrolithographie | |
DE10132840A1 (de) | Formung von Bestrahlungsstärkeprofilen unter Verwendung von optischen Elementen mit positiven und negativen optischen Brechkräften | |
DE29724852U1 (de) | Vorrichtung zur Formgebung von Objekten | |
EP0154700B1 (de) | Braggzellen-Spektralanalysator mit einem Prismenaufweitungssystem | |
DE3829728A1 (de) | Verfahren und vorrichtung zum homogenisieren der intensitaetsverteilung im querschnit eines laserstrahls | |
WO1985001870A1 (en) | Neodym-yag-laser, particularly for ophthalmological treatment | |
DE102008035898A1 (de) | Vorrichtung und Verfahren zur Specklereduktion im Bereich der Laseranwendungen | |
DE2505774A1 (de) | Optisches laser-mikroskopgeraet zum laserbeschuss mikroskopischer probenbereiche | |
DE102005017014B4 (de) | Verfahren zur Formung eines Beleuchtungslaserstrahls und Beleuchtungseinrichtung mit einem Laser | |
DE4131361C2 (de) | Vorrichtung zur Bestrahlung der Hornhaut | |
DE4103615C2 (de) | Vorrichtung zur chirurgischen Behandlung einer Augenhornhautoberfläche mit einer Laserlichtquelle | |
EP0782420A1 (de) | Vorrichtung zur formung der cornea | |
DE2558053C3 (de) | Verfahren und Vorrichtung zum Einstellen des Brennpunktes eines Arbeitslaserstrahls auf einen gewünschten Mikrobereich eines Objektes | |
DE2638276A1 (de) | Optische blende und damit ausgeruestete laseroptische einrichtung | |
DE4239073C1 (de) | Medizinisches Handstück | |
DE8908123U1 (de) | Vorrichtung zur Bestimmung der Fokusebene unsichtbarer Therapie-Laserstrahlung in ophthalmologischen Geräten | |
EP0373189A1 (de) | Spaltlampengerät zur laserbehandlung des auges |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
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 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19880921 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT CH FR GB IT LI |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
17Q | First examination report despatched |
Effective date: 19900924 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19920720 |