Inventor · disambiguated record
Petrus A. Kramer
Also filed as: AUSTERMUHLE-BERTOLA HELENA · KRAMER PETRUS A · VERBRUGGE PIETER A
20 granted patents·49 citations·filing 1975–1983
92Inventor score
Top patents by PatentIndex Score
20 records- 0176US4028418AProcess for the preparation of cyclobutanonesSHELL OIL CO·Filed 1975·Granted Jun 7, 1977·13 cites·17 claims
- 0264US4285882ATrihalocyclopropyl carbonatesSHELL OIL CO·Filed 1980·Granted Aug 25, 1981·5 cites·11 claims
- 0363US4174348APreparation of cyclopropanecarbonitrilesSHELL INT RESEARCH·Filed 1978·Granted Nov 13, 1979·6 cites·7 claims
- 0458US4247711APreparation of 2-formyl-3,3-dimethylcyclopropaneacetic acidSHELL OIL CO·Filed 1979·Granted Jan 27, 1981·4 cites·43 claims
- 0557US4242279A2-(2,2-Dihalovinyl)-3,3-dimethylcyclopropylacetone pyrethroid intermediatesSHELL OIL CO·Filed 1979·Granted Dec 30, 1980·3 cites·4 claims
- 0656US4132728APreparation of nitrilesSHELL OIL CO·Filed 1977·Granted Jan 2, 1979·4 cites·13 claims
- 0750US4298756A1R, Cis 2,2-dihalovinyl-3,3-dimethylcyclopropylmethanol and ester derivativesSHELL OIL CO·Filed 1979·Granted Nov 3, 1981·2 cites·5 claims
- 0850US4294765ACis-lactone pyrethroid intermediatesSHELL OIL CO·Filed 1980·Granted Oct 13, 1981·3 cites·3 claims
- 0946US4230891A2-(2,2-Dihalovinyl)-3,3-dimethylcyclopropanecarbaldehyde dimethyl acetalSHELL OIL CO·Filed 1978·Granted Oct 28, 1980·2 cites·3 claims
- 1045US4346038AOxabicyclo[3.1.0]hexan-2-onesSHELL OIL CO·Filed 1981·Granted Aug 24, 1982·1 cites·4 claims
- 1141US4375557AProcess for the preparation of dihalovinylcyclopropane carboxylic acidSHELL OIL CO·Filed 1982·Granted Mar 1, 1983·1 cites·4 claims
- 1241US4305890ACyclopropyl dihalo phosphitesSHELL OIL CO·Filed 1980·Granted Dec 15, 1981·1 cites·6 claims
- 1340US4388247ATrihalomethylation of aldehydesSHELL OIL CO·Filed 1980·Granted Jun 14, 1983·1 cites·14 claims
- 1440US4180520APreparation of nitrilesSHELL OIL CO·Filed 1978·Granted Dec 25, 1979·1 cites·14 claims
- 1537US4335253APreparation of dihalovinyl compoundsSHELL OIL CO·Filed 1981·Granted Jun 15, 1982·1 cites·9 claims
- 1637US4307243AProcess of preparing dihalovinyl compoundsSHELL OIL CO·Filed 1980·Granted Dec 22, 1981·1 cites·12 claims
- 1734US4398032AProcess for the preparation of 4-dihalomethyl-3-oxabicyclo[3.1.0]hexan-2-onesSHELL OIL CO·Filed 1982·Granted Aug 9, 1983·0 cites·3 claims
- 1834US4332730ADihalomethylenelactone pyrethroid intermediatesSHELL OIL CO·Filed 1981·Granted Jun 1, 1982·0 cites·5 claims
- 1933US4219504APreparation of 2-(2-acetyl-3-oxobutyl)-3,3-dimethylcyclopropanecarbaldehydeSHELL OIL CO·Filed 1979·Granted Aug 26, 1980·0 cites·14 claims
- 2031US4497966AProcess for the preparation of nitrophenylalkanolsSHELL OIL CO·Filed 1983·Granted Feb 5, 1985·0 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →