AT245287B - Verfahren zur Herstellung von Kontaktlinsen aus quellfähigen Hydrogelen - Google Patents

Verfahren zur Herstellung von Kontaktlinsen aus quellfähigen Hydrogelen

Info

Publication number
AT245287B
AT245287B AT749464A AT749464A AT245287B AT 245287 B AT245287 B AT 245287B AT 749464 A AT749464 A AT 749464A AT 749464 A AT749464 A AT 749464A AT 245287 B AT245287 B AT 245287B
Authority
AT
Austria
Prior art keywords
production
contact lenses
swellable hydrogels
swellable
hydrogels
Prior art date
Application number
AT749464A
Other languages
English (en)
Inventor
Otto Wichterle
Original Assignee
Ceskoslovenska Akademie Ved
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=5393629&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AT245287(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ceskoslovenska Akademie Ved filed Critical Ceskoslovenska Akademie Ved
Application granted granted Critical
Publication of AT245287B publication Critical patent/AT245287B/de

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses
    • G02B1/043—Contact lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/0009—After-treatment of articles without altering their shape; Apparatus therefor using liquids, e.g. solvents, swelling agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00038—Production of contact lenses
    • B29D11/00067—Hydrating contact lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00932—Combined cutting and grinding thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00932—Combined cutting and grinding thereof
    • B29D11/00942—Combined cutting and grinding thereof where the lens material is mounted in a support for mounting onto a cutting device, e.g. a lathe, and where the support is of machinable material, e.g. plastics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/808—Lens mold

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)
AT749464A 1963-09-07 1964-08-31 Verfahren zur Herstellung von Kontaktlinsen aus quellfähigen Hydrogelen AT245287B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS497163 1963-09-07

Publications (1)

Publication Number Publication Date
AT245287B true AT245287B (de) 1966-02-25

Family

ID=5393629

Family Applications (1)

Application Number Title Priority Date Filing Date
AT749464A AT245287B (de) 1963-09-07 1964-08-31 Verfahren zur Herstellung von Kontaktlinsen aus quellfähigen Hydrogelen

Country Status (9)

Country Link
US (2) US3361858A (de)
AT (1) AT245287B (de)
BE (1) BE652737A (de)
DE (1) DE1495381B2 (de)
DK (1) DK111391B (de)
ES (1) ES303817A1 (de)
GB (1) GB1035877A (de)
NL (1) NL140454B (de)
SE (1) SE308603B (de)

Families Citing this family (113)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT251910B (de) * 1964-07-02 1967-01-25 Ceskoslovenska Akademie Ved Verfahren zur Herstellung von weichen, biegsamen Kontaktlinsen
US3503942A (en) * 1965-10-23 1970-03-31 Maurice Seiderman Hydrophilic plastic contact lens
AT265699B (de) * 1966-02-15 1968-10-25 Ceskoslovenska Akademie Ved Verfahren zur Herstellung von Linsen mit asphärischen Flächen aus Plasten
DK116168B (da) * 1966-02-22 1969-12-15 Ceskoslovenska Akademie Ved Fremgangsmåde til slibning og polering af kontaktlinser fremstillet ved polymerisationsstøbning af en hydrofil monomerblanding.
US3488111A (en) * 1967-03-16 1970-01-06 Nat Patent Dev Corp Hydrophilic hydrogel corneal contact lens with hard central insert
US3655129A (en) * 1968-07-17 1972-04-11 Ppg Industries Inc Slow release films and methods of making same
US3822089A (en) * 1968-09-25 1974-07-02 Akademie Ved Contact lens blank or replica made from anhydrous, sparingly cross-linked hydrophilic copolymers
US3689673A (en) * 1970-11-10 1972-09-05 Barnes Hind Pharm Inc The process of soaking and sterilizing hydrophilic soft contact lenses with chlorhexidene
US3951528A (en) * 1971-06-02 1976-04-20 Patent Structures, Inc. Method of making polymeric contact lens
CS153765B1 (de) * 1971-10-14 1974-03-29
US4093361A (en) * 1971-11-15 1978-06-06 Precision Cosmet Co., Inc. Composite prosthetic polymeric devices
US3931373A (en) * 1971-12-21 1976-01-06 J. O. Beattie Research Company Replication processes for producing plastic optical components
US3880818A (en) * 1972-01-03 1975-04-29 Mitchel Shen Physiologically compatible plastic contact lenses and a method for their production
CS159428B1 (de) * 1972-02-01 1975-01-31
US3786812A (en) * 1972-03-10 1974-01-22 C Neefe Contact lens for olar drug delivery
GB1439132A (en) * 1972-03-13 1976-06-09 Special Polymers Ltd Method for the production of a hydrophilic polymer product
US3948841A (en) * 1972-05-22 1976-04-06 Karel Dusek Process for producing transparent gels with improved mechanical and sorption properties from copolymers of 2-hydroxyethyl methacrylate and amides of acrylic or methacrylic acid
US3867329A (en) * 1972-08-25 1975-02-18 Polysciences Inc Composition for a hydrogel dilator article of manufacture and method for making same
US3841598A (en) * 1972-09-19 1974-10-15 B Grucza A mold for casting a hydrophilic contact lens blank
US3876581A (en) * 1972-10-10 1975-04-08 Erickson Polymer Corp Hydrophilic polymer composition for prosthetic devices
US4079021A (en) * 1972-11-06 1978-03-14 Ceskoslovenska Akademie Ved Polymeric carrier for a controlled synthesis of peptides
US3894129A (en) * 1973-03-15 1975-07-08 American Optical Corp Method of manufacture of strain free contact lenses
US4067839A (en) * 1973-04-04 1978-01-10 Itek Corporation Hydrophilic copolymer of N,N-(C1 -C2 alkyl) acrylamide
US3878175A (en) * 1973-07-27 1975-04-15 Plastik Devices Inc Highly absorbent spongy polymer materials
US4031037A (en) * 1973-08-29 1977-06-21 Jaroslav Kalal Three-dimensional polymeric gel materials containing phosphoric acid residues capable of dissociation and a method for their preparation
GB1488001A (en) * 1973-10-06 1977-10-05 Global Vision Ltd Contact lenses
US3984485A (en) * 1973-10-09 1976-10-05 Neefe Charles W Wettable polymeric materials prepared from 2-50% by wt. N-(1,1-dimethyl-3-oxobutyl)acrylamide, 2.5% by wt. crosslinking agent and methyl methacrylate
US4038264A (en) * 1974-01-07 1977-07-26 National Patent Development Corporation Hema copolymers having high oxygen permeability
US3980084A (en) * 1974-01-09 1976-09-14 Hydro Optics, Inc. Ostomy gasket
US3957741A (en) * 1974-01-17 1976-05-18 California Institute Of Technology Crosslinked, porous, polyacrylate beads
US3985632A (en) * 1974-01-17 1976-10-12 California Institute Of Technology Small, porous polyacrylate beads
US4046720A (en) * 1974-01-17 1977-09-06 California Institute Of Technology Crosslinked, porous, polyacrylate beads
CS173201B1 (de) * 1974-02-13 1977-02-28
US4042652A (en) * 1974-03-28 1977-08-16 Agfa-Gevaert, A.G. Method for the production of silicone elastomer-containing articles
US4121885A (en) * 1974-04-29 1978-10-24 Precision Cosmet Co., Inc. Method to produce a composite contact lens
US4197266A (en) * 1974-05-06 1980-04-08 Bausch & Lomb Incorporated Method for forming optical lenses
US3963685A (en) * 1974-05-13 1976-06-15 Abrahams Robert A Alcohol soluble hydrophilic polymer via aqueous polymerization
JPS543738B2 (de) * 1974-05-27 1979-02-26
AR207867A1 (es) * 1974-07-04 1976-11-08 Smith & Nephew Res Un copolimero hidrogel ligeramente entrelazado
CS175082B1 (de) * 1974-08-28 1977-04-29
US4060678A (en) * 1975-02-11 1977-11-29 Plastomedical Sciences, Inc. Cationic hydrogels based on hydroxyalkyl acrylates and methacrylates
US4071508A (en) * 1975-02-11 1978-01-31 Plastomedical Sciences, Inc. Anionic hydrogels based on hydroxyalkyl acrylates and methacrylates
US3979891A (en) * 1975-03-07 1976-09-14 Patton Orvil D Pneumatic fruit harvester
US4022855A (en) * 1975-03-17 1977-05-10 Eastman Kodak Company Method for making a plastic optical element having a gradient index of refraction
US4068933A (en) * 1975-03-18 1978-01-17 Maurice Seiderman Fenestrated hydrogels for contact lens use and method for making same
US4152508A (en) * 1978-02-15 1979-05-01 Polymer Technology Corporation Silicone-containing hard contact lens material
US4170616A (en) * 1978-05-30 1979-10-09 Rca Corporation Method of fabrication of a Fresnel lens
US4322139A (en) * 1978-06-21 1982-03-30 Spofa, Spojene Podniky Pro Zdravotnickou Vyrobu Hydrophilic-gel contact lenses adapted into a planarized xerogel state and method for making the same
US4208365A (en) * 1978-12-20 1980-06-17 National Patent Development Corporation Method and apparatus for molding toric contact lenses
US4298002A (en) * 1979-09-10 1981-11-03 National Patent Development Corporation Porous hydrophilic materials, chambers therefrom, and devices comprising such chambers and biologically active tissue and methods of preparation
WO1982000147A1 (en) * 1980-07-08 1982-01-21 Co B F Goodrich Hydrophilic interpolymers of acrylic acid and an acrylate
US4555372A (en) * 1981-03-23 1985-11-26 Bausch & Lomb Incorporated Rotational molding of contact lenses
DE3117474A1 (de) * 1981-05-02 1982-11-18 Fa. Carl Zeiss, 7920 Heidenheim Verfahren und vorrichtung zum herstellen von formteilen mit asphaerischen oberflaechen
IL62899A0 (de) * 1981-05-18 1981-07-31
EP0067671B1 (de) * 1981-06-12 1989-11-15 National Research Development Corporation Hydrogele
CA1184367A (en) * 1981-06-22 1985-03-26 Novartis Ag Process for producing shaped articles having improved surfaces
US5507805A (en) * 1982-05-03 1996-04-16 American Cyanamid Company Intraocular lens and method of retaining in place
US4450262A (en) * 1982-08-11 1984-05-22 Diamond Shamrock Chemicals Company Hydrophilic copolymer compositions useful as contact lenses
US4459246A (en) * 1982-08-26 1984-07-10 Neefe Charles W Molding contact lenses using a directed stream of gas
US4590018A (en) * 1982-09-13 1986-05-20 Neefe Charles W Method of improving spin cast lenses
US4597918A (en) * 1982-09-13 1986-07-01 Neefe Charles W Method of removing soft contact lenses from the mold
US4457880A (en) * 1983-02-15 1984-07-03 Neefe Charles W Method of making contact lens blanks
US4693939A (en) * 1983-06-03 1987-09-15 Minnesota Mining And Manufacturing Company Article coated with copolymer of poly(vinyl alcohol)
US4840992A (en) * 1983-06-03 1989-06-20 Minnesota Mining And Manufacturing Company Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol)
US4921908A (en) * 1983-06-03 1990-05-01 Minnesota Mining And Manufacturing Company Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol)
US4694037A (en) * 1983-06-03 1987-09-15 Minnesota Mining And Manufacturing Company Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol)
US4528325A (en) * 1983-06-03 1985-07-09 Minnesota Mining And Manufacturing Co. Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol)
US4673539A (en) * 1983-06-03 1987-06-16 Minnesota Mining And Manufacturing Company Process for thermoformed articles
US4780514A (en) * 1983-06-03 1988-10-25 Minnesota Mining And Manufacturing Company Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol)
US4618649A (en) * 1983-06-03 1986-10-21 Minnesota Mining And Manufacturing Company Copolymers of poly(vinyl trifluoroacetate) or poly(vinyl alcohol)
GB2144749B (en) * 1983-08-09 1986-10-08 Plastomedical Sciences Inc Disposable, hydrogel soft cantact lenses
US4540532A (en) * 1984-02-02 1985-09-10 Coburn Optical Industries, Inc. Method and apparatus for molding ophthalmic lenses
CS249989B1 (en) * 1984-04-06 1987-04-16 Otto Wichterle Hydrophilic thre-dimensional polymer and method of its production
CS256889B1 (en) * 1984-04-20 1988-04-15 Otto Wichterle Method of contact lenses' centrifugal casting in open moulds and equipment for realization of this method
GB2163653B (en) * 1984-08-16 1988-05-18 Siepser Steven B Dry artificial intraocular lenses and method for their surgical implantation
US4680336A (en) * 1984-11-21 1987-07-14 Vistakon, Inc. Method of forming shaped hydrogel articles
US4541969A (en) * 1984-12-03 1985-09-17 Neefe Charles W Method of making toric spin cast lenses
GB2171106B (en) * 1984-12-18 1989-10-11 Tr Dev Ltd Hydrogel-forming polymers
EP0188110B1 (de) 1984-12-18 1995-09-06 T R Developments Ltd Hydrogelformende Polymere
GB8519071D0 (en) * 1984-12-18 1985-09-04 Tahan M Hydrogel-forming polymers
US5135965A (en) * 1984-12-18 1992-08-04 T. R. Developments, Ltd. Hydrogel-forming polymers used in intraocular lenses
US4636338A (en) * 1985-01-11 1987-01-13 Neefe Charles W Molding toric contact lenses using a directed stream of gas
GB8508247D0 (en) * 1985-03-29 1985-05-09 Sola Int Holdings Contact lenses
US4786446A (en) * 1985-05-17 1988-11-22 Minnesota Mining And Manufacturing Company Process of forming a hydroxy-substitute polymeric shaped article
CS252224B1 (en) * 1985-07-31 1987-08-13 Otto Wichterle Hydrophilic copolymer suitable eapecially for contact lenses and medicinal utilization and method of its producion
CS256437B1 (en) * 1985-09-04 1988-04-15 Otto Wichterle Hydrophilic copolymer especially for contact lenses and medicinal application and method of its production
IT1197154B (it) * 1985-09-04 1988-11-30 Ceskoslovenska Akademie Ved Metodo per la preparazione di elementi precolati per la produzione di lenti a contatto mediante lavorazione meccanica
EP0226123A3 (de) * 1985-12-03 1988-08-10 Matsushita Electric Industrial Co., Ltd. Verfahren zum Herstellen eines Gegenstandes aus organischem Glas
CS260213B1 (en) * 1986-03-05 1988-12-15 Jiri Sulc Method of polymerization casting of articles especially lenses from hydrophilic gels and equipment for realization of this method
US4837260A (en) * 1986-05-23 1989-06-06 Toagosei Chemical Industry Co., Ltd. Cyanoacrylate compositions
US4766023A (en) * 1987-01-16 1988-08-23 Minnesota Mining And Manufacturing Company Method for making a flexible louvered plastic film with protective coatings and film produced thereby
US4921884A (en) * 1987-02-26 1990-05-01 Minnesota Mining And Manufacturing Company Hydroxy-substituted polymeric shaped hydrogel article
JP2763776B2 (ja) * 1988-05-27 1998-06-11 日本原子力研究所 細孔化コンタクトレンズの製造法
DE3823317A1 (de) * 1988-07-09 1990-02-08 Bayer Ag Rohlinge fuer kontaktoptische gegenstaende
US5342624A (en) * 1989-02-16 1994-08-30 British Technology Group Ltd. Dispensing device
CA2009668A1 (en) 1989-02-16 1990-08-16 Ashok R. Thakrar Colored contact lenses and method of making same
US5143659A (en) * 1989-10-04 1992-09-01 Eastman Kodak Company Method and apparatus for manufacturing aspherically shaped small lenses
US5040961A (en) * 1989-10-04 1991-08-20 Eastman Kodak Company Apparatus for manufacturing aspherically shaped small lenses
US5094609A (en) * 1990-04-17 1992-03-10 Vistakon, Inc. Chamber for hydrating contact lenses
US5080839A (en) * 1990-04-17 1992-01-14 Johnson & Johnson Vision Products, Inc. Process for hydrating soft contact lenses
US5118760A (en) * 1990-12-26 1992-06-02 Eastman Kodak Company Impact resistant polymer blends
US5260000A (en) * 1992-08-03 1993-11-09 Bausch & Lomb Incorporated Process for making silicone containing hydrogel lenses
US5260001A (en) * 1992-08-03 1993-11-09 Bausch & Lomb Incorporated Spincasting process for producing a series of contact lenses having desired shapes
US5316704B1 (en) * 1992-09-28 1996-05-21 Kabi Pharmacia Ophthalmics Inc Process for fabricating full sized expansible hydrogel intraocular lenses
US5480950A (en) * 1992-09-28 1996-01-02 Kabi Pharmacia Ophthalmics, Inc. High refractive index hydrogels and uses thereof
TW272976B (de) * 1993-08-06 1996-03-21 Ciba Geigy Ag
US5439950A (en) * 1994-06-27 1995-08-08 Kabi Pharmacia Ophthalmics, Inc. Water miscible non-hydrolyzable cross-linkers and high refractive index hydrogels prepared therewith
US5718862A (en) * 1996-04-24 1998-02-17 Hercules Incorporated Secondary shaping of ionically crosslinked polymer compositions for medical devices
SG54538A1 (en) * 1996-08-05 1998-11-16 Hoya Corp Soft contact lens with high moisture content and method for producing the same
US5913862A (en) * 1997-04-25 1999-06-22 James Ramsey Umbilical cord cutting and clamping device
US6020445A (en) * 1997-10-09 2000-02-01 Johnson & Johnson Vision Products, Inc. Silicone hydrogel polymers
US20040091613A1 (en) * 2002-11-13 2004-05-13 Wood Joe M. Methods for the extraction of contact lenses
TWI859401B (zh) 2020-01-27 2024-10-21 新加坡商科萊博新加坡私人有限公司 光化可交聯的聚矽氧烷－聚甘油嵌段共聚物及其製造和使用方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2332930A (en) * 1939-10-21 1943-10-26 Rinia Herre Optical element
US3030859A (en) * 1959-05-25 1962-04-24 Jr Daniel O Elliott Method of making contact lenses

Also Published As

Publication number Publication date
NL6410392A (de) 1965-03-08
BE652737A (de) 1964-12-31
DE1495381B2 (de) 1971-06-24
SE308603B (de) 1969-02-17
GB1035877A (en) 1966-07-13
ES303817A1 (es) 1965-03-01
DK111391B (da) 1968-08-12
DE1495381A1 (de) 1969-09-25
US3361858A (en) 1968-01-02
NL140454B (nl) 1973-12-17
US3699089A (en) 1972-10-17

Similar Documents

Publication Publication Date Title
AT245287B (de) Verfahren zur Herstellung von Kontaktlinsen aus quellfähigen Hydrogelen
AT244579B (de) Verfahren zur Herstellung von Kontaktlinsen
CH468967A (de) Verfahren zur Herstellung von Aminen
CH486514A (de) Verfahren zur Herstellung von elastischen Formkörpern aus vernetzten Polyurethanen
CH456550A (de) Verfahren zur Herstellung von Wasserstoff
CH384100A (de) Verfahren zur Herstellung von Kontaktfedern
CH457333A (de) Verfahren zur Herstellung von Amyloglucosidase
CH501019A (de) Verfahren zur Herstellung von ultrafeinem Polytetrafluoräthylen
CH456963A (de) Verfahren zur Herstellung von fluorhaltigen Siliziumverbindungen
CH403821A (de) Verfahren zur Herstellung von flüssigem Wasserstoff
AT257556B (de) Verfahren zur Herstellung von Alkoholen
AT252212B (de) Verfahren zur Herstellung von Dicarbinolen
CH430750A (de) Verfahren zur Herstellung von Azapentanolen
CH438234A (de) Verfahren zur Herstellung von Wasserstoff
CH467718A (de) Verfahren zur Herstellung von Wasserstoff
CH472406A (de) Verfahren zur Herstellung von Indolen
AT279572B (de) Verfahren zur Herstellung von ω-Lactamen
CH460759A (de) Verfahren zur Herstellung von 11a-Hydroxy-progesteron
CH432488A (de) Verfahren zur Herstellung von Polyäther
CH415603A (de) Verfahren zur Herstellung von Diacetonitril
AT263996B (de) Verfahren zur Herstellung von gummielastischen Fäden aus sulfochlorierten Polyolefinen
AT247834B (de) Verfahren zur Herstellung von Wasserstoff
CH437247A (de) Verfahren zur Herstellung von Ylenalen
AT250928B (de) Verfahren zur Herstellung von Sorbinsäurehalogeniden
CH478072A (de) Verfahren zur Herstellung von Olefinen