Tomei Sangyo Kabushiki Kaisha

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
D06P DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM 118
 
  
 
G02C SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES 148

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5244470 Method for marking a water-absorptive contact lens: dyeing dry lens with a mark using reduced vat dye and then making the dye insolubleJan 28, 92Sep 14, 93[D06P, G02C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5487788 Method for cleaning and disinfecting contact lensExpiredMay 09, 94Jan 30, 96[B08B]
5460658 Method for cleaning or preserving a contact lens by means of liquid compositionExpiredJun 17, 94Oct 24, 95[B08B, C11D]
5409546 Method for cleaning, preserving and disinfecting contact lensesExpiredOct 08, 93Apr 25, 95[B08B]
5409731 Method for imparting a hydrophilic nature to a contact lensExpiredOct 08, 92Apr 25, 95[B05D]
5401431 Cleaning-preserving aqueous solution for contact lenses and method for cleaning and disinfecting a contact lens by means thereofExpiredSep 29, 93Mar 28, 95[B08B, C11D]
5314590 Method for cleaning and disinfecting soft contact lens and treating solution for soft contact lensesExpiredMar 29, 93May 24, 94[C25B]
5314823 Method for cleaning a contact lensExpiredOct 20, 92May 24, 94[D06M, C02F, C11D]
5302312 Detergent for contact lens comprising a water-soluble compound and a copolymer of polyhydric alcohol and a cross-linked acrylic acid and a method for washing contact lensExpiredNov 27, 91Apr 12, 94[C11D]
5283053 Apparatus for treating contact lenses and contact lens treating vessel for use thereinExpiredOct 21, 92Feb 01, 94[H05B, A61L]
5281277 Liquid composition for contact lenses and method for cleaning a contact lensExpiredApr 08, 92Jan 25, 94[C12N, A61L, C11D]
5246552 Method for cleaning and disinfecting soft contact lens and treating solution for soft contact lensesExpiredMay 20, 91Sep 21, 93[C25B]
5206298 Graft copolymer, solution containing the graft copolymer for treating contact lens, and method of treating contact lens with the solution and making hydrophilic lens surfaceExpiredDec 14, 90Apr 27, 93[C08F, G02C]
5142009 Hard contact lens materialExpiredJun 22, 88Aug 25, 92[C08F]
5134213 Polymer-type polymerization initiatorExpiredSep 03, 91Jul 28, 92[C08F]
5082912 Polymer-type polymerization initiatorExpiredDec 11, 90Jan 21, 92[C08F]
4940542 Liquid purifying deviceExpiredOct 27, 89Jul 10, 90[E01D]
4904421 Soft ocular lens and method for its preparationExpiredNov 12, 87Feb 27, 90[B29D]
4868260 Hard contact lens material consisting of alkyl fumarate and silicon-alkyl fumarate copolymersExpiredOct 24, 86Sep 19, 89[C08F]
4788227 Contact lens formed from a hydrogel fundamental materialExpiredMar 18, 87Nov 29, 88[C08J]
4699946 Hydrogel fundamental materialExpiredMar 18, 85Oct 13, 87[C08L]

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