HYDRON LIMITED

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Patent Activity in the Last 10 Years

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Top Patents (by citation)

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
D431720 ContainersMar 02, 98Oct 10, 00[0301]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2002/0020,634 ARTICLE COMPRISING STACKABLE CONTAINERSAbandonedFeb 28, 00Feb 21, 02[A45C]
6048371 Process for preparing soft tinted lensesExpiredNov 24, 97Apr 11, 00[D06P]
5637265 Pad printing coating composition and pad printing processExpiredAug 24, 94Jun 10, 97[B29D]
5300262 Process of spincasting a compound contact lensExpiredOct 29, 92Apr 05, 94[B29D]
5076683 Spuncast compound contact lensExpiredSep 14, 88Dec 31, 91[G02C]
4923480 Opaque tinting of contact lenses with random positions of color depthExpiredSep 21, 87May 08, 90[C08J, D06P]
4782946 Soft contact lens hydration device and kitExpiredSep 17, 87Nov 08, 88[B65D, A45C]
4738530 Inspection deviceExpiredJul 10, 86Apr 19, 88[G01B]
4681295 Tricurve optical metal master mold and method of makingExpiredJul 29, 85Jul 21, 87[B27D]
4634449 Opaque tinting process for contact lensExpiredSep 20, 85Jan 06, 87[D06P]
4632055 Apparatus for tinting soft contact lensesExpiredMar 22, 85Dec 30, 86[B05C]
4620851 Method for tinting soft contact lensesExpiredJan 28, 86Nov 04, 86[B05D, B29D, D06P]
4584148 Method for the precision trimming of the edge of a centrifugally cast lensExpiredMar 25, 85Apr 22, 86[B29D]
4559897 Hydrophilic lens tinting and coloring apparatusExpiredMar 29, 85Dec 24, 85[B05C]
4543882 Contact lens marking fixtureExpiredJul 16, 84Oct 01, 85[B41F]
4534723 Cutting device for the precision trimming of the edge of a centrifugally cast lensExpiredJan 30, 84Aug 13, 85[B29C]
4518390 Lens tinting fixture and system utilizing said fixtureExpiredMar 23, 84May 21, 85[B05C, B05D, G03B]
4516924 Retaining means for device for centrifugally casting symmetrical or asymmetrical articlesExpiredMay 04, 83May 14, 85[B29C, B29J]
4517140 Device and method for centrifugally casting articlesExpiredMay 02, 83May 14, 85[B29D]
4468184 Gas feed means for use in centrifugal casting devicesExpiredMay 02, 83Aug 28, 84[B29G, B28B, B29D]

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