DRUG ROYALTY CORP. INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5986001 Ocular lens composition and method of formationExpiredDec 11, 97Nov 16, 99[C08L]
5789483 Ocular lens composition and method of formationExpiredSep 04, 96Aug 04, 98[C08L]
5723541 Ocular lens composition and method of formationExpiredJun 13, 94Mar 03, 98[C08L]
4550139 Mixtures of polyacrylate resins and siloxane-styrene copolymersExpiredJan 13, 83Oct 29, 85[C08L]
4478981 Mixtures of polyacrylate resins and siloxane carbonate copolymersExpiredMar 22, 82Oct 23, 84[C08L]

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