Inventor · disambiguated record
Katsuyoshi Sasagawa
Also filed as: SASAGAWA KATSUYOSHI
46 granted patents·1 pending application·1,884 citations·filing 1980–2002
99Inventor score
Top patents by PatentIndex Score
47 records- 0199US4775733AHigh-refractivity plastic lens resin formed by reacting at least one polyisocyanate with at least one polythiolMITSUI TOATSU CHEMICALS·Filed 1987·Granted Oct 4, 1988·186 cites·22 claims
- 0298US5191055AMercapto compound, a high refractive index resin and lens and a process for preparing themMITSUI TOATSU CHEMICALS·Filed 1992·Granted Mar 2, 1993·164 cites·9 claims
- 0398US5059673AResin for urethane lenses, lenses comprising the resin, and a process for preparation of the resin and the lensesMITSUI TOATSU CHEMICALS·Filed 1990·Granted Oct 22, 1991·111 cites·8 claims
- 0497US5753730APlastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur-containing urethane resin lens and lens prepared therebyMITSUI TOATSU CHEMICALS·Filed 1991·Granted May 19, 1998·111 cites·26 claims
- 0597US5374668ACasting epoxy resin, polythiol and releasing agent to form lensMITSUI TOATSU CHEMICALS·Filed 1989·Granted Dec 20, 1994·102 cites·6 claims
- 0697US5087758AMercapto compound, a high refractive index resin and lens and a process for preparing themMITSUI TOATSU CHEMICALS·Filed 1989·Granted Feb 11, 1992·159 cites·19 claims
- 0796US5693738AComposition for urethane-base plastic lens, urethane-base plastic lens obtained from the composition, and process for the production of the plastic lensMITSUI TOATSU CHEMICALS·Filed 1995·Granted Dec 2, 1997·129 cites·18 claims
- 0896US4542201AResin for high-refractivity lenses and lenses made of same resinMITSUI TOATSU CHEMICALS·Filed 1984·Granted Sep 17, 1985·89 cites·2 claims
- 0996US4314039APolypropylene composition containing a 1.3,2.4-di(alkylbenzylidene) sorbitolMITSUI TOATSU CHEMICALS·Filed 1980·Granted Feb 2, 1982·75 cites·8 claims
- 1095US5352758AMercapto compound, its preparation process, and sulfur-containing urethane resins and lenses using the sameMITSUI TOATSU CHEMICALS·Filed 1993·Granted Oct 4, 1994·48 cites·8 claims
- 1194US4707430AOptical recording mediumOZAWA HIROSHI·Filed 1986·Granted Nov 17, 1987·73 cites·11 claims
- 1293US4946923AS-alkyl thiocarbamate base resin, plastic lens comprising the resin, and process for making the lensMITSUI TOATSU CHEMICALS·Filed 1989·Granted Aug 7, 1990·57 cites·24 claims
- 1391US5393607ALaminated transparent plastic material and polymerizable monomerMITSUI TOATSU CHEMICALS·Filed 1993·Granted Feb 28, 1995·57 cites·29 claims
- 1488US4980497AMonomer of carbonate ester having isopropenylphenyl groupMITSUI TOATSU CHEMICALS·Filed 1989·Granted Dec 25, 1990·22 cites·1 claims
- 1587US5594088APlastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur containing urethane resin lens and lens prepared therebyMITSUI TOATSU CHEMICALS·Filed 1995·Granted Jan 14, 1997·47 cites·29 claims
- 1686US4707425AOptical recording method and media thereforMITSUI TOATSU CHEMICALS·Filed 1986·Granted Nov 17, 1987·62 cites·12 claims
- 1785US5013496AProcess for molding a highly-refractive plastic lensMITSUI TOATSU CHEMICALS·Filed 1989·Granted May 7, 1991·27 cites·5 claims
- 1885US4929707APolyurethane base lens resin, plastic lens comprising the resin and preparation method of the lensMITSUI TOATSU CHEMICALS·Filed 1989·Granted May 29, 1990·47 cites·27 claims
- 1983US5126425ALow-hygroscopic sulfur-containing urethane resin, coating material and adhesiveMITSUI TOATSU CHEMICALS·Filed 1990·Granted Jun 30, 1992·30 cites·7 claims
- 2082US5126388AHighly-refractive plastic lens and process for making the lensMITSUI TOATSU CHEMICALS·Filed 1991·Granted Jun 30, 1992·25 cites·4 claims
- 2182US5021503AResin for plastic lens having high-refractive index, lens comprising the resin, and method for preparation of the lensMITSUI TOATSU CHEMICALS·Filed 1989·Granted Jun 4, 1991·26 cites·19 claims
- 2279US4791185AHigh-refractivity plastic lens resin formed from a polyisocyanate and a polythiolMITSUI TOATSU CHEMICALS·Filed 1987·Granted Dec 13, 1988·38 cites·14 claims
- 2377US5084538AHigh surface hardness transparent resin prepared from a compound having at least one isopropenyl phenyl groupMITSUI TOATSU CHEMICALS·Filed 1990·Granted Jan 28, 1992·27 cites·9 claims
- 2472US4508655AMetal complexes of halogen-substituted o-benzenedithiolsMITSUI TOATSU CHEMICALS·Filed 1982·Granted Apr 2, 1985·8 cites·2 claims
- 2569US5306799AHigh refractive index plastic lens and composition thereforMITSUI TOATSU CHEMICALS·Filed 1993·Granted Apr 26, 1994·16 cites·10 claims
- 2666US5652321AComposition for optical materials and use thereofMITSUI TOATSU CHEMICALS·Filed 1995·Granted Jul 29, 1997·8 cites·6 claims
- 2765US5440358AOptical lens comprised of high surface hardness transparent resinMITSUI TOATSU CHEMICALS·Filed 1993·Granted Aug 8, 1995·7 cites·3 claims
- 2863US5756766AComposition for optical materials and use thereofMITSUI TOATSU CHEMICALS·Filed 1997·Granted May 26, 1998·7 cites·5 claims
- 2962US5104953AHard transparent resins and process for the production thereofMITSUI TOATSU CHEMICALS·Filed 1989·Granted Apr 14, 1992·12 cites·5 claims
- 3059US4529684AComposition suitable for use in the production of laser beam recording/reading meansMITSUI TOATSU CHEMICALS·Filed 1984·Granted Jul 16, 1985·17 cites·2 claims
- 3156US5126426AAlicyclic diamines, alicyclic diisocyanates and polyisocyanato-isocyanurates and method for the preparation thereofMITSUI TOATSU CHEMICALS·Filed 1990·Granted Jun 30, 1992·5 cites·5 claims
- 3255US5578658AHigh-speed polymerizable resin composition and lenses obtained therefromMITSUI TOATSU CHEMICALS·Filed 1994·Granted Nov 26, 1996·9 cites·4 claims
- 3354US5451695APolymerizable monomer useful for the preparation of high hardness transparent resinsMITSUI TOATSU CHEMICALS·Filed 1995·Granted Sep 19, 1995·9 cites·7 claims
- 3454US5283312AMercapto compound, its preparation process, and sulfur-containing urethane resins and lenses using the sameMITSUI TOATSU CHEMICALS·Filed 1992·Granted Feb 1, 1994·13 cites·2 claims
- 3554US5166285AHard transparent resins and process for the production thereofMITSUI TOATSU CHEMICALS·Filed 1992·Granted Nov 24, 1992·9 cites·4 claims
- 3652US5145927AHigh surface hardness transparent resin prepared from a compound having terminal isopropenyl phenyl groupsMITSUI TOATSU CHEMICALS·Filed 1990·Granted Sep 8, 1992·8 cites·19 claims
- 3749US4522993AResin for high-refractivity lenses and lenses made of same resinMITSUI TOATSU CHEMICALS·Filed 1983·Granted Jun 11, 1985·12 cites·18 claims
- 3847US5250723AHigh surface hardness transparent resin and polymerizable monomerMITSUI TOATSU CHEMICALS·Filed 1992·Granted Oct 5, 1993·6 cites·3 claims
- 3946US4481131AElectroconductive resin compositionMITSUI TOATSU CHEMICALS·Filed 1982·Granted Nov 6, 1984·6 cites·6 claims
- 4043US4632969AResin for high-refractivity lensesMITSUI TOATSU CHEMICALS·Filed 1983·Granted Dec 30, 1986·8 cites·3 claims
- 4141US5260439APolymerizable monomer having at least one isopropenyl phenyl group and being capable of forming a high surface hardness transparent resinMITSUI TOATSU CHEMICALS·Filed 1991·Granted Nov 9, 1993·7 cites·1 claims
- 4236US2003181612A1Methacrylic resin and use thereofFiled 2002·Application pending·0 cites
- 4335US5124429APolyisocyanatoalkylphenyl-isocyanurates, method for the preparation thereof and use thereofMITSUI TOATSU CHEMICALS·Filed 1991·Granted Jun 23, 1992·2 cites·3 claims
- 4435US5091496APolyisocyanatoalkylphenyl-isocyanurates, method for the preparation thereof and use thereofMITSUI TOATSU CHEMICALS·Filed 1990·Granted Feb 25, 1992·2 cites·9 claims
- 4534US5171468AAromatic polyisocyanateMITSUI TOATSU CHEMICALS·Filed 1991·Granted Dec 15, 1992·1 cites·8 claims
- 4631US5210286AAlicyclic diamines, alicyclic diisocyanates and polyisocyanato-isocyanurates and method for the preparation thereofMITSUI TOATSU CHEMICALS·Filed 1992·Granted May 11, 1993·0 cites·2 claims
- 4728US5336749AAlicyclic diamines, alicyclic diisocyanates and polyisocyanato-isocyanurates and method for the preparation thereofMITSUI TOATSU CHEMICALS·Filed 1993·Granted Aug 9, 1994·0 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →