Tyndale Plains-Hunter, Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6130309 Hydrophilic polyether polyurethanes containing carboxylic acidExpiredSep 20, 96Oct 10, 00[A61K, C08G]
6007793 Hair spray compositions containing carboxylated polyurethane resinsExpiredSep 20, 96Dec 28, 99[A61K]
5993972 Hydrophilic and hydrophobic polyether polyurethanes and uses thereforExpiredMar 18, 98Nov 30, 99[C08G]
5962620 Hydrophicic and hydrophobic polyether polyurethanes and uses thereforExpiredAug 26, 97Oct 05, 99[C08G]
5932200 Polyether polyurethane polymers, gels, solutions and uses thereofExpiredMar 16, 98Aug 03, 99[A61K, C08G]
5728762 Polyether polyurethane polymers, gels, solutions and uses thereofExpiredAug 14, 96Mar 17, 98[C08G]
5563233 Polyether polyurethane polymers and gels having improved absorption and slip propertiesExpiredNov 16, 94Oct 08, 96[C08L]
5334691 Hydrophilic polyurethanes of improved strengthExpiredApr 23, 92Aug 02, 94[C08G, A61F]
5273742 Biomedical water soluble hydrophilic polyurethane polymers and method of use thereofExpiredDec 30, 91Dec 28, 93[A61K]
5120816 Hydrophilic polyurethanes of improved strengthExpiredJul 24, 90Jun 09, 92[C08G, A61F]
5000955 Thermally reversible polyurethane hydrogels and cosmetic, biological and medical usesExpiredJul 23, 90Mar 19, 91[C08J, A61K, C12N, C08L]
4920172 Hydrophilic polyurethane emulsions and materials produced therefromExpiredJan 30, 89Apr 24, 90[C08L]
4810543 Articles having low friction surfaces and production thereofExpiredOct 17, 86Mar 07, 89[B32B]
4810582 Hydrophilic polyurethane compositionExpiredMar 18, 88Mar 07, 89[B32B]
4798876 Hydrophilic polyurethane compositionExpiredNov 12, 85Jan 17, 89[C08F]
4789720 Hydrophilic polyurethanes prepared from mixed oxyalkylene glycolsExpiredMar 09, 88Dec 06, 88[C08G]
4780512 Polyurethane acrylate compositionsExpiredOct 09, 87Oct 25, 88[C08L]
4743673 Hydrophilic carboxy polyurethanesExpiredDec 19, 86May 10, 88[C08G]
4729914 Hydrophilic coating and substrate coated therewithExpiredMay 22, 87Mar 08, 88[B32B]
4496535 Polyurethane polyene compositionsExpiredMay 07, 84Jan 29, 85[A61J, B32B]

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