Inventor · disambiguated record
Hans Zengel
Also filed as: BERGFELD MANFRED · ZENGEL HANS · ZENGEL HANS G · ZENGEL HANS-GEORG
53 granted patents·650 citations·filing 1974–1990
99Inventor score
Top patents by PatentIndex Score
53 records- 0195US4898978AProcess for the preparation of N,N'-disubstituted guanidinesAKZO NV·Filed 1986·Granted Feb 6, 1990·60 cites·11 claims
- 0292US4203916APreparation of trans cyclohexane 1,4 diisocyanateAKZONA INC·Filed 1978·Granted May 20, 1980·17 cites·10 claims
- 0390US4404401AProcess for the preparation of para-amino-diphenylamineAKZONA INC·Filed 1979·Granted Sep 13, 1983·23 cites·11 claims
- 0488US4301257APolyfunctional isocyanates free of alkali and urea groupsAKZONA INC·Filed 1980·Granted Nov 17, 1981·43 cites·15 claims
- 0584US4670556AProcess for the production of thiazolyl-2-sulphenamidesAKZO NV·Filed 1984·Granted Jun 2, 1987·15 cites·8 claims
- 0684US4486603APreparation of trans cyclohexane 1,4-diamineAKZONA INC·Filed 1982·Granted Dec 4, 1984·11 cites·1 claims
- 0784US4468526AProcess for the preparation of thiuram disulfidesAKZONA INC·Filed 1982·Granted Aug 28, 1984·16 cites·9 claims
- 0882US4459424AProcess for the preparation of thiuram disulfidesAKZONA INC·Filed 1982·Granted Jul 10, 1984·17 cites·9 claims
- 0982US4210602AProcess for the preparation of asymmetrical N-phenyl-N'-substituted para-phenylene diaminesAKZONA INC·Filed 1979·Granted Jul 1, 1980·14 cites·11 claims
- 1079US4307236AProcess for the preparation of dithiazole-disulfidesAKZONA INC·Filed 1980·Granted Dec 22, 1981·12 cites·7 claims
- 1178US4418211APreparation of trans-cyclohexane-1,4-disulphonyl ureaAKZONA INC·Filed 1980·Granted Nov 29, 1983·8 cites·1 claims
- 1277US4467114APreparation of trans cyclohexane 1,4-diureaAKZONA INC·Filed 1982·Granted Aug 21, 1984·7 cites·1 claims
- 1377US4439370APreparation of trans cyclohexane 1,4-diisocyanateAKZONA INC·Filed 1982·Granted Mar 27, 1984·7 cites·1 claims
- 1477US4433078AWaterdispersible cationic resins for electrodepositionAKZO NV·Filed 1980·Granted Feb 21, 1984·26 cites·16 claims
- 1576US4275223APreparation of trans-cyclohexane-1,4-diurethanesAKZONA INC·Filed 1979·Granted Jun 23, 1981·6 cites·6 claims
- 1675US4332601AMethod for making silica fibersAKZO NV·Filed 1980·Granted Jun 1, 1982·17 cites·10 claims
- 1774US4457871APreparation of trans cyclohexane,1,4-diisocyanate and related compoundsAKZONA INC·Filed 1982·Granted Jul 3, 1984·6 cites·1 claims
- 1873US4178315AProcess for the preparation of nitrosobenzeneAKZONA INC·Filed 1978·Granted Dec 11, 1979·19 cites·10 claims
- 1973US4057588AProcess for the preparation of phloroglucinolAKZONA INC·Filed 1976·Granted Nov 8, 1977·9 cites·8 claims
- 2072US4675246AFlexible multilayer polyimide laminatesAKZO NV·Filed 1985·Granted Jun 23, 1987·48 cites·26 claims
- 2171US4699841AFlexible multilayer polymide laminatesAKZO NV·Filed 1986·Granted Oct 13, 1987·24 cites·18 claims
- 2270US4558135AProcess for the preparation of dithiazolyl disulfidesAKZONA INC·Filed 1981·Granted Dec 10, 1985·7 cites·8 claims
- 2370US4356289APolymeric N-halogenoamides on the basis of acrylamide and methacrylamideAKZO NV·Filed 1981·Granted Oct 26, 1982·17 cites·4 claims
- 2469US4522880AThick polyimide-metal laminates with high peel strengthAKZONA INC·Filed 1983·Granted Jun 11, 1985·36 cites·18 claims
- 2567US4437960AMethod for the crosslinking of cathodically depositable coating agentsAKZO NV·Filed 1981·Granted Mar 20, 1984·19 cites·16 claims
- 2667US4316031AProcess for the preparation of 2-mercaptobenzothiazoleAKZONA INC·Filed 1979·Granted Feb 16, 1982·5 cites·11 claims
- 2766US4115451ABenzene-1,3,5-tris-acetoxime and the process for making phloroglucinol therewithAKZONA INC·Filed 1977·Granted Sep 19, 1978·5 cites·2 claims
- 2865US4442281AThermoplastic polyurethane-elastomers from cyclohexane-1,4-diisocyanateAKZO NV·Filed 1983·Granted Apr 10, 1984·16 cites·26 claims
- 2965US3931210AProduction of p-aminobenzoic acidAKZO NV·Filed 1974·Granted Jan 6, 1976·6 cites·16 claims
- 3064US4223145AProcess for the preparation of organic mono- and polyisocyanatesAKZO NV·Filed 1979·Granted Sep 16, 1980·6 cites·7 claims
- 3164US4071555ABenzene-1,3,5-tris-acetoxime and the process for making phloroglucinol therewithAKZONA INC·Filed 1977·Granted Jan 31, 1978·5 cites·1 claims
- 3261US4705720AFlexible multi-layer polyimide laminatesAKZO NV·Filed 1987·Granted Nov 10, 1987·30 cites·19 claims
- 3361US4238404AProcess for the preparation of isocyanate derivatives of aliphatic, cycloaliphatic, and araliphatic compoundsAKZONA INC·Filed 1979·Granted Dec 9, 1980·5 cites·5 claims
- 3458US4357447APolymere N-halogenamide auf basis von acryl-und methacrylamidAKZO NV·Filed 1980·Granted Nov 2, 1982·10 cites·4 claims
- 3558US4332600AMethod for making silica fibersAKZO NV·Filed 1980·Granted Jun 1, 1982·12 cites·23 claims
- 3658US4053510AProcess for the production of aromatic and cycloaliphatic dicarboxylic acid diamidesAKZO NV·Filed 1974·Granted Oct 11, 1977·4 cites·9 claims
- 3757US4289869AMixture hardening under the influence of air moisture and a process for production of polyisocyanate-poly-addition products or of cross-linked polyepoxidesAKZO NV·Filed 1980·Granted Sep 15, 1981·12 cites·14 claims
- 3857US4129740AProcess for the preparation of para-nitroso-diphenylhydroxylaminesAKZONA INC·Filed 1978·Granted Dec 12, 1978·3 cites·8 claims
- 3956US4256869APolyurethanes from trans-cyclohexane-1,4-diisocyanateAKZO NV·Filed 1979·Granted Mar 17, 1981·10 cites·29 claims
- 4056US3965172AProduction of N,N-dichloro-terephthalamide and N,N-dichloro-isophthalamideAKZONA INC·Filed 1974·Granted Jun 22, 1976·4 cites·9 claims
- 4154US4259258APreparation of bis-n-chloramides of cycloaliphatic carboxylic acidsAKZONA INC·Filed 1978·Granted Mar 31, 1981·3 cites·3 claims
- 4252US4471019AWater-containing water glass fibersAKZO NV·Filed 1983·Granted Sep 11, 1984·7 cites·4 claims
- 4351US5021603AThiuram polysulfide productionAKZO NV·Filed 1985·Granted Jun 4, 1991·3 cites·8 claims
- 4451US4746561APolyimide-containing cover layer for a printed circuit elementAKZO NV·Filed 1986·Granted May 24, 1988·9 cites·10 claims
- 4549US4157450ABenzene-1,3,5-tris-acetoxime and the process for making phloroglucinol therewithAKZONA INC·Filed 1978·Granted Jun 5, 1979·2 cites·2 claims
- 4647US4346233AProcess for the preparation of ureasAKZONA INC·Filed 1981·Granted Aug 24, 1982·2 cites·3 claims
- 4741US4342707AProcess for the preparation of bis-N-chloramidesAKZONA INC·Filed 1978·Granted Aug 3, 1982·1 cites·6 claims
- 4835US4123461ABenzene-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
- 4933US4393238AMethod for the production of blocked isocyanatesAKZO NV·Filed 1981·Granted Jul 12, 1983·2 cites·4 claims
- 5033US4317947AProcess for the preparation of nitrosobenzeneAKZONA INC·Filed 1980·Granted Mar 2, 1982·0 cites·3 claims
Showing the top 50 of 53 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →