Inventor · disambiguated record
Hartmut Knofel
Also filed as: KNOEFEL HARTMUT · KNOFEL HARTMUT
36 granted patents·346 citations·filing 1973–1996
97Inventor score
Top patents by PatentIndex Score
36 records- 0196US4692550AContinuous process for thermal splitting of carbamic acid estersBAYER AG·Filed 1983·Granted Sep 8, 1987·58 cites·10 claims
- 0289US4087459AProcess for the preparation of polyaminesBAYER AG·Filed 1976·Granted May 2, 1978·23 cites·15 claims
- 0387US3996283AProcess for the production of polyaminesBAYER AG·Filed 1973·Granted Dec 7, 1976·29 cites·13 claims
- 0486US4405527AProcess for the preparation of polyisocyanatesBAYER AG·Filed 1982·Granted Sep 20, 1983·22 cites·7 claims
- 0585US4259526AProcess for the preparation of mixtures of polyamines of the polyamino-polyaryl-polymethylene typeBAYER AG·Filed 1979·Granted Mar 31, 1981·18 cites·9 claims
- 0678US4924028AProcess for the production of polynuclear aromatic polyaminesBAYER AG·Filed 1989·Granted May 8, 1990·15 cites·5 claims
- 0778US4914236AProcess for the preparation of multinuclear aromatic polyaminesBAYER AG·Filed 1988·Granted Apr 3, 1990·15 cites·9 claims
- 0878US3952042AProcess for the production of polyisocyanatesBAYER AG·Filed 1974·Granted Apr 20, 1976·11 cites·2 claims
- 0973US4061678AProcess for the preparation of aromatic polyaminesBAYER AG·Filed 1975·Granted Dec 6, 1977·9 cites·6 claims
- 1069US5043471AProcess for the preparation of polyisocyanatesBAYER AG·Filed 1990·Granted Aug 27, 1991·12 cites·8 claims
- 1167US5196591AProcess for the production of polynuclear aromatic polyaminesBAYER AG·Filed 1992·Granted Mar 23, 1993·17 cites·4 claims
- 1267US4675437ACycloaliphatic triisocyanatesBAYER AG·Filed 1985·Granted Jun 23, 1987·8 cites·2 claims
- 1364US4879409ACycloaliphatic diisocyanates, optionally in the form of isomeric mixtures and a process for their preparationBAYER AG·Filed 1987·Granted Nov 7, 1989·7 cites·5 claims
- 1462US4613687APolyisocyanates of the diphenyl methane seriesBAYER AG·Filed 1981·Granted Sep 23, 1986·6 cites·1 claims
- 1561US4879408ACycloaliphatic diisocyanates optionally in the form of isomer mixtures and a process for their productionBAYER AG·Filed 1987·Granted Nov 7, 1989·6 cites·5 claims
- 1659US4093658AProcess for the preparation of aromatic polyaminesBAYER AG·Filed 1975·Granted Jun 6, 1978·11 cites·10 claims
- 1757US5359141AProcess for the production of polynuclear aromatic polyaminesBAYER AG·Filed 1992·Granted Oct 25, 1994·14 cites·4 claims
- 1854US4761498ADiisocyanates and diisocyanate mixtures based on diphenylmethane, processes for their production and their use as isocyanate component in the production of polyurethane plastics by the isocyanate polyaddition processBAYER AG·Filed 1987·Granted Aug 2, 1988·4 cites·6 claims
- 1953US5684180AFractionation and purification of aromatic polyamine mixtures and the use thereofBAYER AG·Filed 1996·Granted Nov 4, 1997·5 cites·9 claims
- 2053US5679841AFractionation and purification of aromatic polyamine mixtures and the use thereofBAYER AG·Filed 1996·Granted Oct 21, 1997·5 cites·11 claims
- 2153US4094907AProcess for the preparation of polyaminesBAYER AG·Filed 1976·Granted Jun 13, 1978·8 cites·16 claims
- 2251US4025557AProcess for the production of polyaminesBAYER AG·Filed 1974·Granted May 24, 1977·3 cites·16 claims
- 2350US5679840AFractionation and purification of aromatic polyamine mixtures and the use thereofBAYER AG·Filed 1996·Granted Oct 21, 1997·4 cites·14 claims
- 2450US4786751ADissocyanates, diisocyanate mixtures and a process for their productionBAYER AG·Filed 1985·Granted Nov 22, 1988·7 cites·10 claims
- 2550US4698424AIsocyanato-isocyanurate derivativesBAYER AG·Filed 1984·Granted Oct 6, 1987·8 cites·3 claims
- 2647US4603189ATriisocyanates and a process for their preparationBAYER AG·Filed 1985·Granted Jul 29, 1986·6 cites·7 claims
- 2745US5663424AFractionation and purification of aromatic polyamine mixtures and the use thereofBAYER AG·Filed 1996·Granted Sep 2, 1997·3 cites·9 claims
- 2840US4593117AProcess for the preparation of N- and O-substituted diurethanes and/or polyurethanesBAYER AG·Filed 1984·Granted Jun 3, 1986·5 cites·13 claims
- 2939US4231952AProcess for the production of monoisocyanateBAYER AG·Filed 1977·Granted Nov 4, 1980·1 cites·11 claims
- 3037US5672737AFractionation and purification of mixtures of aromatic polyamines and use thereofBAYER AG·Filed 1996·Granted Sep 30, 1997·1 cites·14 claims
- 3137US4587058ADiisocyanates of the diphenyl methane series and processes for the production thereofBAYER AG·Filed 1981·Granted May 6, 1986·1 cites·12 claims
- 3234US4720582ADiamines and a process for their productionBAYER AG·Filed 1983·Granted Jan 19, 1988·2 cites·8 claims
- 3334US4147724AProcess for the preparation of polyaminesBAYER AG·Filed 1976·Granted Apr 3, 1979·2 cites·5 claims
- 3430US5675035AFractionation and purification of aromatic polyamine mixtures and the use thereofBAYER AG·Filed 1996·Granted Oct 7, 1997·0 cites·12 claims
- 3530US5648520AFractionation and purification of aromatic polyamine and the use thereofBAYER AG·Filed 1996·Granted Jul 15, 1997·0 cites·10 claims
- 3623US5648519AFractionation and purification of aromatic polyamine mixtures and the use thereofBAYER AKTIENGESESELLSCHAFT·Filed 1996·Granted Jul 15, 1997·0 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →