Inventor · disambiguated record
Manfred Bergfeld
Also filed as: BERGFELD MANFRED · BERGFELD MANFRED F · KLIMESCH ERICH · ZENGEL HANS
36 granted patents·1 pending application·322 citations·filing 1974–2007
97Inventor score
Top patents by PatentIndex Score
37 records- 0192US4203916APreparation of trans cyclohexane 1,4 diisocyanateAKZONA INC·Filed 1978·Granted May 20, 1980·17 cites·10 claims
- 0290US4404401AProcess for the preparation of para-amino-diphenylamineAKZONA INC·Filed 1979·Granted Sep 13, 1983·23 cites·11 claims
- 0388US4301257APolyfunctional isocyanates free of alkali and urea groupsAKZONA INC·Filed 1980·Granted Nov 17, 1981·43 cites·15 claims
- 0484US4670556AProcess for the production of thiazolyl-2-sulphenamidesAKZO NV·Filed 1984·Granted Jun 2, 1987·15 cites·8 claims
- 0584US4486603APreparation of trans cyclohexane 1,4-diamineAKZONA INC·Filed 1982·Granted Dec 4, 1984·11 cites·1 claims
- 0684US4468526AProcess for the preparation of thiuram disulfidesAKZONA INC·Filed 1982·Granted Aug 28, 1984·16 cites·9 claims
- 0782US4459424AProcess for the preparation of thiuram disulfidesAKZONA INC·Filed 1982·Granted Jul 10, 1984·17 cites·9 claims
- 0882US4210602AProcess for the preparation of asymmetrical N-phenyl-N'-substituted para-phenylene diaminesAKZONA INC·Filed 1979·Granted Jul 1, 1980·14 cites·11 claims
- 0979US4307236AProcess for the preparation of dithiazole-disulfidesAKZONA INC·Filed 1980·Granted Dec 22, 1981·12 cites·7 claims
- 1078US4418211APreparation of trans-cyclohexane-1,4-disulphonyl ureaAKZONA INC·Filed 1980·Granted Nov 29, 1983·8 cites·1 claims
- 1177US4467114APreparation of trans cyclohexane 1,4-diureaAKZONA INC·Filed 1982·Granted Aug 21, 1984·7 cites·1 claims
- 1277US4439370APreparation of trans cyclohexane 1,4-diisocyanateAKZONA INC·Filed 1982·Granted Mar 27, 1984·7 cites·1 claims
- 1376US4275223APreparation of trans-cyclohexane-1,4-diurethanesAKZONA INC·Filed 1979·Granted Jun 23, 1981·6 cites·6 claims
- 1474US4457871APreparation of trans cyclohexane,1,4-diisocyanate and related compoundsAKZONA INC·Filed 1982·Granted Jul 3, 1984·6 cites·1 claims
- 1573US4178315AProcess for the preparation of nitrosobenzeneAKZONA INC·Filed 1978·Granted Dec 11, 1979·19 cites·10 claims
- 1673US4057588AProcess for the preparation of phloroglucinolAKZONA INC·Filed 1976·Granted Nov 8, 1977·9 cites·8 claims
- 1770US4558135AProcess for the preparation of dithiazolyl disulfidesAKZONA INC·Filed 1981·Granted Dec 10, 1985·7 cites·8 claims
- 1870US4356289APolymeric N-halogenoamides on the basis of acrylamide and methacrylamideAKZO NV·Filed 1981·Granted Oct 26, 1982·17 cites·4 claims
- 1967US4316031AProcess for the preparation of 2-mercaptobenzothiazoleAKZONA INC·Filed 1979·Granted Feb 16, 1982·5 cites·11 claims
- 2066US4115451ABenzene-1,3,5-tris-acetoxime and the process for making phloroglucinol therewithAKZONA INC·Filed 1977·Granted Sep 19, 1978·5 cites·2 claims
- 2164US4071555ABenzene-1,3,5-tris-acetoxime and the process for making phloroglucinol therewithAKZONA INC·Filed 1977·Granted Jan 31, 1978·5 cites·1 claims
- 2261US4238404AProcess for the preparation of isocyanate derivatives of aliphatic, cycloaliphatic, and araliphatic compoundsAKZONA INC·Filed 1979·Granted Dec 9, 1980·5 cites·5 claims
- 2358US4357447APolymere N-halogenamide auf basis von acryl-und methacrylamidAKZO NV·Filed 1980·Granted Nov 2, 1982·10 cites·4 claims
- 2457US4129740AProcess for the preparation of para-nitroso-diphenylhydroxylaminesAKZONA INC·Filed 1978·Granted Dec 12, 1978·3 cites·8 claims
- 2556US3965172AProduction of N,N-dichloro-terephthalamide and N,N-dichloro-isophthalamideAKZONA INC·Filed 1974·Granted Jun 22, 1976·4 cites·9 claims
- 2654US4259258APreparation of bis-n-chloramides of cycloaliphatic carboxylic acidsAKZONA INC·Filed 1978·Granted Mar 31, 1981·3 cites·3 claims
- 2752US6159894ACatalyst for dehydrogenation of amino alcohols to amino carboxylic acids or of ethylene glycol (derivatives) to oxycarboxylic acids, method for their production and their useAKZO NOBEL NV·Filed 1997·Granted Dec 12, 2000·15 cites·22 claims
- 2851US2010093880A1Recycling cleavage of polyurethanesBERGFELD MANFRED·Filed 2007·Application pending·0 cites
- 2949US4157450ABenzene-1,3,5-tris-acetoxime and the process for making phloroglucinol therewithAKZONA INC·Filed 1978·Granted Jun 5, 1979·2 cites·2 claims
- 3048US6222075B1Process for the production of N, N, N′, N′,-tetra-(2-hydroxyethyl)ethylene diamineAKZO NOBEL NV·Filed 1998·Granted Apr 24, 2001·5 cites·18 claims
- 3147US4346233AProcess for the preparation of ureasAKZONA INC·Filed 1981·Granted Aug 24, 1982·2 cites·3 claims
- 3241US4342707AProcess for the preparation of bis-N-chloramidesAKZONA INC·Filed 1978·Granted Aug 3, 1982·1 cites·6 claims
- 3337US4242523AProcess for the preparation of para-nitroso-diphenyl-hydroxylaminesAKZONA INC·Filed 1979·Granted Dec 30, 1980·1 cites·9 claims
- 3435US4123461ABenzene-tricarboxylic acid-(1,3,5)-tri-N-chloramide and process for the preparation thereofAKZONA INC·Filed 1977·Granted Oct 31, 1978·0 cites·2 claims
- 3533US4393238AMethod for the production of blocked isocyanatesAKZO NV·Filed 1981·Granted Jul 12, 1983·2 cites·4 claims
- 3633US4317947AProcess for the preparation of nitrosobenzeneAKZONA INC·Filed 1980·Granted Mar 2, 1982·0 cites·3 claims
- 3729US4314089AProcess for the preparation of nitrosobenzeneAKZONA INC·Filed 1980·Granted Feb 2, 1982·0 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →