Inventor · disambiguated record
Gerd Schreyer
Also filed as: GEIGER FRIEDHELM · SCHREYER GERD
44 granted patents·326 citations·filing 1972–1982
98Inventor score
Top patents by PatentIndex Score
44 records- 0191US4150241AProcess for the production of pure racemic acid and mesotartaric acid and separation of maleic acid from synthetic tartaric acidDEGUSSA·Filed 1976·Granted Apr 17, 1979·21 cites·37 claims
- 0289US4239696AProcess for the production of alkyl sulfonic acidsGEIGER FRIEDHELM·Filed 1976·Granted Dec 16, 1980·26 cites·13 claims
- 0388US4377344AApparatus for bringing liquids in contactDEGUSSA·Filed 1979·Granted Mar 22, 1983·15 cites·4 claims
- 0488US4113747AProcess for the preparation of propylene oxideBAYER AG·Filed 1976·Granted Sep 12, 1978·19 cites·32 claims
- 0584US4303621AProcess for the recovery of methionine and potassium bicarbonateDEGUSSA·Filed 1978·Granted Dec 1, 1981·25 cites·13 claims
- 0683US4341709APreparation of ε-caprolactoneBAYER AG·Filed 1980·Granted Jul 27, 1982·15 cites·20 claims
- 0780US4025540AProcess for the production of pure carboxylic acid-1-monoglyceridesDEGUSSA·Filed 1975·Granted May 24, 1977·25 cites·18 claims
- 0879US4228084AProcess for the production of glycidyl methacrylateDEGUSSA·Filed 1976·Granted Oct 14, 1980·10 cites·9 claims
- 0978US4314064AProcess for the production of nicotinamideDEGUSSA·Filed 1980·Granted Feb 2, 1982·10 cites·12 claims
- 1073US4137242AProcess for the preparation of propylene oxideBAYER AG·Filed 1976·Granted Jan 30, 1979·8 cites·32 claims
- 1172US4048225AProcess for the production of pure racemic acid and mesotartaric acidDEGUSSA·Filed 1976·Granted Sep 13, 1977·20 cites·30 claims
- 1271US4101570AProcess for the production of percarboxylic acid solutions in organic solventsDEGUSSA·Filed 1973·Granted Jul 18, 1978·8 cites·18 claims
- 1371US4009188AContinuous process for recovery of glycideDEGUSSA·Filed 1975·Granted Feb 22, 1977·7 cites·3 claims
- 1469US4054739AProcess for the substitution of chlorine atoms of cyanuric chlorideDEGUSSA·Filed 1976·Granted Oct 18, 1977·6 cites·13 claims
- 1569US4017413AProcess for the production of solutions or suspensions of cyanuric chloride in aqueous organic solventsDEGUSSA·Filed 1975·Granted Apr 12, 1977·6 cites·14 claims
- 1668US4058662AProcess for the substitution of chlorine atoms of cyanuric chlorideDEGUSSA·Filed 1976·Granted Nov 15, 1977·6 cites·21 claims
- 1766US4052445AProcess for the production of alkyl sulfonic acidsDEGUSSA·Filed 1976·Granted Oct 4, 1977·6 cites·13 claims
- 1865US4197161AProcess for the recovery of catalysts in the epoxidation and hydroxylation of olefinic compoundsDEGUSSA·Filed 1975·Granted Apr 8, 1980·11 cites·28 claims
- 1963US4059619AProcess for the preparation of percarboxylic acid solutionsDEGUSSA·Filed 1976·Granted Nov 22, 1977·6 cites·17 claims
- 2059US4065510AProduction of an alkenol from an alkene oxideDEGUSSA·Filed 1975·Granted Dec 27, 1977·14 cites·3 claims
- 2158US4171445AProcess for the production of pyridine and 3-methyl pyridineDEGUSSA·Filed 1975·Granted Oct 16, 1979·3 cites·16 claims
- 2257US3931208AProcess for the production of thiazolines-(3)DEGUSSA·Filed 1973·Granted Jan 6, 1976·4 cites·22 claims
- 2356US4089887AProcess for the production of isothiocyanatesDEGUSSA·Filed 1977·Granted May 16, 1978·4 cites·18 claims
- 2454US4159925AProcess for isolating propylene glycol diesters in the preparation of propylene oxideBAYER AG·Filed 1977·Granted Jul 3, 1979·3 cites·10 claims
- 2551US4139536AProcess for the recovery of nicotinamideDEGUSSA·Filed 1976·Granted Feb 13, 1979·2 cites·12 claims
- 2650US4046862AProcess for the production of cyanogen chloride using hydrogen peroxide with pressureDEGUSSA·Filed 1976·Granted Sep 6, 1977·5 cites·25 claims
- 2748US3960766ACatalyst for the production of pyridine and 3-methylpyridineDEGUSSA·Filed 1973·Granted Jun 1, 1976·9 cites·19 claims
- 2842US3956304APreparation of 2-methyl-4-isopropylidene-2-oxazolin-5-oneDEGUSSA·Filed 1974·Granted May 11, 1976·1 cites·13 claims
- 2942US3946069AProcess of making penicillamineDEGUSSA·Filed 1972·Granted Mar 23, 1976·2 cites·9 claims
- 3041US3961023AProcess for the production of cyanogen chloride and hydrogen chlorideDEGUSSA·Filed 1975·Granted Jun 1, 1976·3 cites·18 claims
- 3140US4387081AProcess for the production of hydrogen cyanideDEGUSSA·Filed 1981·Granted Jun 7, 1983·4 cites·16 claims
- 3240US4087455AProcess for the continuous preparation of percarboxylic acids in organic solutionsBAYER AG·Filed 1976·Granted May 2, 1978·6 cites·28 claims
- 3339US4007222AProcess for the production of 2-chlorocaproic acidsDEGUSSA·Filed 1975·Granted Feb 8, 1977·1 cites·12 claims
- 3437US4089892AProcess for the preparation of percarboxylic acid solutionsDEGUSSA·Filed 1976·Granted May 16, 1978·1 cites·17 claims
- 3536US4271297AProcess for the production of suspension or solutions of cyanuric chloride in organic solvents (I)DEGUSSA·Filed 1979·Granted Jun 2, 1981·5 cites·9 claims
- 3631US4237299AProcess for the recovery of pyridine and 3-methylpyridineDEGUSSA·Filed 1976·Granted Dec 2, 1980·0 cites·10 claims
- 3731US4090024AProcess for the production of skatylhydantoinDEGUSSA·Filed 1977·Granted May 16, 1978·0 cites·9 claims
- 3831US3949060AProcess for the production of cyanogen chlorideDEGUSSA·Filed 1974·Granted Apr 6, 1976·2 cites·11 claims
- 3930US4269979AProcess for the production of suspension or solution of cyanuric chloride in organic solvents (II)DEGUSSA·Filed 1979·Granted May 26, 1981·0 cites·7 claims
- 4030US3957950AProcess for preparing pure chlorineGEIGER FRIEDHELM·Filed 1973·Granted May 18, 1976·1 cites·15 claims
- 4130US3947552AProcess for the purification of cyanogen chlorideDEGUSSA·Filed 1974·Granted Mar 30, 1976·1 cites·13 claims
- 4229US4413021AProcess for bringing liquids into contactHENTSCHEL KLAUS·Filed 1982·Granted Nov 1, 1983·5 cites·7 claims
- 4329US4061674AProcess of making penicillamineDEGUSSA·Filed 1976·Granted Dec 6, 1977·0 cites·7 claims
- 4425US4434148AWorking up of the residual gases resulting from the production of cyanuric chlorideDEGUSSA·Filed 1979·Granted Feb 28, 1984·0 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →