Assignee
PHOTOPROTECTIVE TECHN INC
US·6 granted patents·1 pending application·193 citations·filing 1988–2014
Top patents by PatentIndex Score
7 records- 0183US5047447AMedium incorporating melanin as an absorbing pigment for protection against electromagnetic radiationPHOTOPROTECTIVE TECHN INC·Filed 1989·Granted Sep 10, 1991·61 cites·25 claims
- 0282US5112883AMedium incorporating melanin as an absorbing pigment against electromagnetic radiationPHOTOPROTECTIVE TECHN INC·Filed 1990·Granted May 12, 1992·58 cites·31 claims
- 0375US6825975B2Light filters using the oxidative polymerization product of 3-Hydroxykynurenine (3-OHKyn)PHOTOPROTECTIVE TECHN INC·Filed 2002·Granted Nov 30, 2004·16 cites·20 claims
- 0461US5187207AMelanin hydrophilic contact lensesPHOTOPROTECTIVE TECHN INC·Filed 1989·Granted Feb 16, 1993·23 cites·41 claims
- 0557US5036115AOptical lens system incorporating melanin as an absorbing pigment for protection against electromagnetic radiationPHOTOPROTECTIVE TECHN INC·Filed 1990·Granted Jul 30, 1991·25 cites·19 claims
- 0648US5116884AMelanin hydrophilic contact lensesPHOTOPROTECTIVE TECHN INC·Filed 1988·Granted May 26, 1992·10 cites·35 claims
- 0746US2015153489A1Light filters that minimize suppression of melatonin and loss of color perceptionPHOTOPROTECTIVE TECHN INC·Filed 2014·Application pending·0 cites
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