Assignee
DENKA CHEMICAL CORP
31 granted patents·367 citations·filing 1974–1984
Top patents by PatentIndex Score
31 records- 0195US4179404ACatalyst preparative methodDENKA CHEMICAL CORP·Filed 1976·Granted Dec 18, 1979·40 cites·7 claims
- 0293US4251390APartial oxidation catalystDENKA CHEMICAL CORP·Filed 1979·Granted Feb 17, 1981·32 cites·20 claims
- 0391US4515899ASteam regeneration of phosphorus treated vanadium-phosphorus-oxygen catalystsDENKA CHEMICAL CORP·Filed 1983·Granted May 7, 1985·35 cites·16 claims
- 0490US4283307ACatalyst structure for the partial oxidation of n-butane to produce maleic anhydrideDENKA CHEMICAL CORP·Filed 1980·Granted Aug 11, 1981·55 cites·9 claims
- 0587US4172961AProduction of 1,4-butanediolDENKA CHEMICAL CORP·Filed 1975·Granted Oct 30, 1979·22 cites·5 claims
- 0687US4123388ACatalyst and process for preparing maleic anhydride from C4 hydrocarbonsDENKA CHEMICAL CORP·Filed 1977·Granted Oct 31, 1978·19 cites·1 claims
- 0781US4153577AOxidation catalysts and process for preparing anhydride from alkanesDENKA CHEMICAL CORP·Filed 1977·Granted May 8, 1979·23 cites·2 claims
- 0877US4152338AProcess of preparing anhydrides from alkanesDENKA CHEMICAL CORP·Filed 1977·Granted May 1, 1979·9 cites·12 claims
- 0975US4152339AProcess for preparing maleic anhydride from c4 hydrocarbonsDENKA CHEMICAL CORP·Filed 1977·Granted May 1, 1979·8 cites·25 claims
- 1068US4158671AOxidation catalysts and process for preparing anhydride from alkanesDENKA CHEMICAL CORP·Filed 1978·Granted Jun 19, 1979·14 cites·5 claims
- 1160US4128514AStable polychloroprene latexDENKA CHEMICAL CORP·Filed 1978·Granted Dec 5, 1978·12 cites·22 claims
- 1260US4081460AProcess for the vapor phase oxidation of benzene to maleic anhydridesDENKA CHEMICAL CORP·Filed 1975·Granted Mar 28, 1978·7 cites·13 claims
- 1359US4121033AChloroprene-sulfur polymerization with di(O-alkylthionothiolcarbonoxy)sulfidesDENKA CHEMICAL CORP·Filed 1976·Granted Oct 17, 1978·10 cites·5 claims
- 1454US4596878AProcess for the production of maleic anhydrideDENKA CHEMICAL CORP·Filed 1984·Granted Jun 24, 1986·9 cites·23 claims
- 1553US4220574APolychloroprene plasticized with corn oilDENKA CHEMICAL CORP·Filed 1978·Granted Sep 2, 1980·11 cites·3 claims
- 1653US4105586AOxidation catalysts and process for preparing anhydride from alkanesDENKA CHEMICAL CORP·Filed 1977·Granted Aug 8, 1978·10 cites·7 claims
- 1753US4071539AProcess for preparing maleic anhydride from C4 hydrocarbonsDENKA CHEMICAL CORP·Filed 1976·Granted Jan 31, 1978·8 cites·6 claims
- 1845US4098989APolychloroprene powdersDENKA CHEMICAL CORP·Filed 1977·Granted Jul 4, 1978·5 cites·13 claims
- 1944US4160079ANovel sulfur compound modifiers for chloroprene polymerizationDENKA CHEMICAL CORP·Filed 1977·Granted Jul 3, 1979·4 cites·4 claims
- 2043US4225682ASulfur modified polychloroprene with improved storage stabilityDENKA CHEMICAL CORP·Filed 1978·Granted Sep 30, 1980·6 cites·13 claims
- 2140US4202826AProcess for preparing anhydride from alkanesDENKA CHEMICAL CORP·Filed 1978·Granted May 13, 1980·5 cites·10 claims
- 2238US4097498AProcess for preparing maleic anhydride from C4 hydrocarbonsDENKA CHEMICAL CORP·Filed 1976·Granted Jun 27, 1978·3 cites·8 claims
- 2337US4565880AMaleic anhydride processDENKA CHEMICAL CORP·Filed 1983·Granted Jan 21, 1986·1 cites·20 claims
- 2437US4167516APreparation of dicarboxylic anhydridesDENKA CHEMICAL CORP·Filed 1978·Granted Sep 11, 1979·4 cites·9 claims
- 2537US4132741AProcess for producing halopreneDENKA CHEMICAL CORP·Filed 1974·Granted Jan 2, 1979·1 cites·3 claims
- 2635US4250083AViscosity stabilized chloroprene-sulfur copolymersDENKA CHEMICAL CORP·Filed 1979·Granted Feb 10, 1981·3 cites·3 claims
- 2734US4481313AProcess for instantaneous peptization of chloroprene-sulfur copolymersDENKA CHEMICAL CORP·Filed 1982·Granted Nov 6, 1984·4 cites·22 claims
- 2833US4212780APolychloroprene non-phasing solvent cementsDENKA CHEMICAL CORP·Filed 1978·Granted Jul 15, 1980·5 cites·20 claims
- 2932US4089751AProcess for recovering high purity cis-1,4-dichlorobutene-2DENKA CHEMICAL CORP·Filed 1976·Granted May 16, 1978·0 cites·3 claims
- 3031US4283510APolychloroprene treated with alkylated diaryl amineDENKA CHEMICAL CORP·Filed 1975·Granted Aug 11, 1981·2 cites·10 claims
- 3111US4203905AMethod for preparing stable, liquid tetrahydrophthalic anhydride for use in preparing polyestersDENKA CHEMICAL CORP·Filed 1978·Granted May 20, 1980·0 cites·6 claims
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