Inventor · disambiguated record
Yutaka Nakahara
Also filed as: KUBOTA NAOHIRO · MINAGAWA MOTONOBU · NAKAHARA YUTAKA
68 granted patents·867 citations·filing 1976–2004
99Inventor score
Files withADEKA ARGUS CHEMICAL CO LTD37ARGUS CHEM22ASAHI DENKA KOGYO KK2NAKAHARA YUTAKA2AKUTSU MITSUO1
Top patents by PatentIndex Score
68 records- 0197US4463113ABis-phenol phosphates as clarifiers for polyolefin resinsNAKAHARA YUTAKA·Filed 1982·Granted Jul 31, 1984·123 cites·32 claims
- 0290US4897438AStabilized synthetic resin compositionHITACHI CHEMICAL CO LTD·Filed 1988·Granted Jan 30, 1990·52 cites·7 claims
- 0390US4812498APolycarbonate resin compositions having improved resistance to deterioration when exposed to light and containing alkylidene bis(benzotriazolyl phenols)ADEKA ARGUS CHEMICAL CO LTD·Filed 1986·Granted Mar 14, 1989·42 cites·26 claims
- 0489US4336183A2,2,6,6-Tetramethyl-4-piperidyl carboxylic acid esters and amides of mono and poly alcohols, phenols and amines as stabilizers for synthetic polymersADEKA ARGUS CHEMICAL CO LTD·Filed 1980·Granted Jun 22, 1982·44 cites·33 claims
- 0588US4468488APoly(piperidylamine) alkanes and synthetic resin compositions stabilized therebyADEKA ARGUS CHEMICAL CO LTD·Filed 1983·Granted Aug 28, 1984·21 cites·30 claims
- 0688US4371647A2,6-Di-tertiary butyl phenyl pentaerythritol spiro bis-phosphites enhancing the stability to heat and light of synthetic resinADEKA ARGUS CHEMICAL CO LTD·Filed 1981·Granted Feb 1, 1983·38 cites·51 claims
- 0788US4171298APhenolic ester synthetic resin stabilizersARGUS CHEM·Filed 1977·Granted Oct 16, 1979·15 cites·15 claims
- 0885US4255301AGlycol carbonate ester stabilizers for synthetic resinsARGUS CHEM·Filed 1978·Granted Mar 10, 1981·27 cites·24 claims
- 0982US4673701AAlkylidene bisphenol phosphites and phosphates having 2,2,6,6-tetramethyl piperidinyl groups and synthetic resin compositionADEKA ARGUS CHEMICAL CO LTD·Filed 1984·Granted Jun 16, 1987·14 cites·36 claims
- 1082US4226991AProcess for preparing 3-alkylthiopropionic acid estersARGUS CHEM·Filed 1978·Granted Oct 7, 1980·28 cites·12 claims
- 1179US4362830AHindered bis-phenol phenyl phosphites and synthetic resin compositions having enhanced stability to heat and lightADEKA ARGUS CHEMICAL CO LTD·Filed 1980·Granted Dec 7, 1982·12 cites·26 claims
- 1278US4740544AHydrocarbyl(polyphenol)-poly(2,2,6,6-tetramethyl piperidyl-1,3,5-triazines) as stabilizers for synthetic polymer compositionsADEKA ARGUS CHEMICAL CO LTD·Filed 1986·Granted Apr 26, 1988·19 cites·10 claims
- 1378US4282141AOrtho-substituted phenyl phosphite additive compositionARGUS CHEM·Filed 1979·Granted Aug 4, 1981·20 cites·18 claims
- 1477US4670492ACyclic bis and tris phosphites and stabilized synthetic resin compositionsADEKA ARGUS CHEMICAL CO LTD·Filed 1985·Granted Jun 2, 1987·14 cites·21 claims
- 1577US4250312AProcess for preparing 4-piperidone spiroketal compoundsARGUS CHEM·Filed 1979·Granted Feb 10, 1981·8 cites·12 claims
- 1676US4743688APoly-2,2,6,6-tetramethyl piperidyl amino spiro glycol ether-1,3,5-triazinesADEKA ARGUS CHEMICAL CO LTD·Filed 1986·Granted May 10, 1988·10 cites·14 claims
- 1775US4692485AVinyl benzyl 2,2,6,6-tetramethyl piperidinesADEKA ARGUS CHEMICAL CO LTD·Filed 1985·Granted Sep 8, 1987·12 cites·25 claims
- 1874US4348308AOrtho-substituted aryl phosphite additive compositionADEKA ARGUS CHEMICAL CO LTD·Filed 1981·Granted Sep 7, 1982·20 cites·18 claims
- 1974US4104217ACarbonate ester stabilizers for polymersARGUS CHEM·Filed 1977·Granted Aug 1, 1978·16 cites·17 claims
- 2073US4529760AOligomers of 2,2,6,6-tetramethylpiperidinol polycarboxylic acid esters and synthetic polymer compositionsADEKA ARGUS CHEMICAL CO LTD·Filed 1983·Granted Jul 16, 1985·22 cites·44 claims
- 2173US4349468AStabilizer for polyolefin resinADEKA ARGUS CHEMICAL CO LTD·Filed 1980·Granted Sep 14, 1982·19 cites·10 claims
- 2273US4210577AStabilizers for synthetic polymers comprising 2,2,6,6-tetramethyl-4-piperidyl carboxylic acid ester, phosphonic acid ester and phenolARGUS CHEM·Filed 1977·Granted Jul 1, 1980·13 cites·35 claims
- 2371US4910238APoly(2,2,6,6-tetramethyl piperidyl amino)-1,3,5-triazines as stabilizers for synthetic polymer compositionsADEKA ARGUS CHEMICAL CO LTD·Filed 1986·Granted Mar 20, 1990·8 cites·10 claims
- 2468US4222931AStabilizers for synthetic polymers comprising 2,2,6,6-tetramethyl-4-piperidyl ether alcohol or ether, phosphonic acid ester and phenolic antioxidantARGUS CHEM·Filed 1977·Granted Sep 16, 1980·10 cites·27 claims
- 2567US4415689ASynthetic resin compositions containing 2,2,6,6-tetramethyl piperidinyl triazinesADEKA ARGUS CHEMICAL CO LTD·Filed 1982·Granted Nov 15, 1983·6 cites·30 claims
- 2667US4321191AStabilized composition comprising a dihydric alcohol thiodipropionic acid esterARGUS CHEM·Filed 1979·Granted Mar 23, 1982·12 cites·13 claims
- 2766US4298520APhenolic ester synthetic resin stabilizersARGUS CHEM·Filed 1979·Granted Nov 3, 1981·10 cites·41 claims
- 2866US4252958AProcess for preparing 2,2,6,6-Tetramethyl-4-oxopiperidineARGUS CHEM·Filed 1978·Granted Feb 24, 1981·5 cites·13 claims
- 2964US4491643ABis(2,2,6,6-tetramethylpiperidyl-1,3,5-triazinyl)-spirodiamines and spiroglycol ethers and synthetic resin compositions containing the sameADEKA ARGUS CHEMICAL CO LTD·Filed 1984·Granted Jan 1, 1985·5 cites·30 claims
- 3064US4415688APoly(piperidylamine) alkanes and synthetic resin compositions stabilized therebyADEKA ARGUS CHEMICAL CO LTD·Filed 1982·Granted Nov 15, 1983·12 cites·17 claims
- 3164US4293472AStabilized synthetic resin compositionMINAGAWA MOTONOBU·Filed 1979·Granted Oct 6, 1981·6 cites·18 claims
- 3263US4405736A2,2,6,6-Tetramethyl-4-piperidyl spiro aliphatic ethers and stabilizers for synthetic polymersADEKA ARGUS CHEMICAL CO LTD·Filed 1981·Granted Sep 20, 1983·14 cites·44 claims
- 3362US4481317AHindered bisphenol diphosphonites and stabilized synthetic resin compositions containing the sameADEKA ARGUS CHEMICAL CO LTD·Filed 1983·Granted Nov 6, 1984·12 cites·38 claims
- 3460US4798836ABis-(2,2,6,6-tetramethyl-piperidyl) diimides as light stabilizers for synthetic polymersADEKA ARGUS CHEMICAL CO LTD·Filed 1987·Granted Jan 17, 1989·5 cites·16 claims
- 3560US4463112APhenylethylidene-substituted phenyl polyphosphitesLEISTNER WILLIAM E·Filed 1980·Granted Jul 31, 1984·13 cites·19 claims
- 3660US4250313AProcess for preparing 4-piperidone spiroketal compoundsARGUS CHEM·Filed 1980·Granted Feb 10, 1981·4 cites·14 claims
- 3759US4871793APolyphenylene sulfide resin compositions having improved resistance to deterioration when exposed to light and containing alkylidene bis (benzotriazolylphenols)NAKAHARA YUTAKA·Filed 1987·Granted Oct 3, 1989·12 cites·23 claims
- 3859US4239803AEthylene polymer compositionARGUS CHEM·Filed 1977·Granted Dec 16, 1980·14 cites·18 claims
- 3956US4698381AN,N',N"-tris((2,2,6,6-tetramethyl-4-piperidyl)triazinyl) undecane triamines as stabilizers for synthetic polymersADEKA ARGUS CHEMICAL CO LTD·Filed 1985·Granted Oct 6, 1987·10 cites·34 claims
- 4056US4199495AThiolcarbonate ester stabilizersARGUS CHEM·Filed 1978·Granted Apr 22, 1980·4 cites·18 claims
- 4156US4105629ASynthetic resin stabilizer comprising a thioether ester and hindered phenolic carbonateARGUS CHEM·Filed 1976·Granted Aug 8, 1978·8 cites·18 claims
- 4255US4418196AProcess for preparing triacetone amineADEKA ARGUS CHEMICAL CO LTD·Filed 1982·Granted Nov 29, 1983·3 cites·16 claims
- 4353US4820844ARadiation sensitizerADEKA ARGUS CHEMICAL CO LTD·Filed 1986·Granted Apr 11, 1989·19 cites·2 claims
- 4450US4371646A2,6-Di-tertiary butyl phenyl phosphites and synthetic resin compositions having enhanced stability to heat and lightADEKA ARGUS CHEMICAL CO LTD·Filed 1980·Granted Feb 1, 1983·7 cites·30 claims
- 4548US4346025AStabilized vinyl chloride polymer comprising a phenylethylidene aryl phosphiteADEKA ARGUS CHEMICAL CO LTD·Filed 1980·Granted Aug 24, 1982·7 cites·12 claims
- 4648US4309335APolyphenylene oxide resin composition stabilizerAKUTSU MITSUO·Filed 1979·Granted Jan 5, 1982·7 cites·13 claims
- 4748US4225474AOrganophosphonate coester stabilizersARGUS CHEM·Filed 1978·Granted Sep 30, 1980·2 cites·16 claims
- 4847US5455347APiperidine compoundsASAHI DENKA KOGYO KK·Filed 1993·Granted Oct 3, 1995·8 cites·5 claims
- 4945US4107136ASynthetic resin stabilizer comprising an organic phosphite and a carbonateARGUS CHEM·Filed 1976·Granted Aug 15, 1978·7 cites·19 claims
- 5044US4477616ATetra-(2,2,6,6-tetramethyl-4-piperidinyl)-3-methyl-5-(1'2'-biscarboxylate)-ethyl-cyclohexane or 3-cyclohexene-1,2-dicarboxylates and synthetic resin compositions containing the sameADEKA ARGUS CHEMICAL CO LTD·Filed 1983·Granted Oct 16, 1984·5 cites·36 claims
Showing the top 50 of 68 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Yutaka Nakahara files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →