Inventor

Frank J. Weigert

Inventor

Wilmington, DE, US

Overview

1977–2004

Patent span

Chemistry

Primary field (CPC C)

Patents· 35 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C07Cprimary

C07CAcyclic or carbocyclic compounds56%

C11DDetergent compositions9%

C07DHeterocyclic compounds7%

F02BInternal-combustion piston engines7%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry5%

C01CAmmonia4%

C09KMaterials for miscellaneous applications, not provided for elsewhere4%

C23GCleaning or de-greasing of metallic material by chemical methods other than electrolysis4%

Y02PClimate change mitigation technologies in the production or processing of goods4%

PatentTitleYear

6,706,935'Catalytic equilibration to increase the relative mole fraction of CF3CHCI, CF3CHCI2 or CF3CF2H in a composition'2004 6,194,619'Gem-dihydropolyfluoroalkanes and monohydropolyfluoroalkenes, processes for their production, and use of gem-dihydropolyfluoroalkanes in cleaning compositions'2001 5,406,009'Catalytic equilibration to improve the relative yield of selected halocarbons'1995 5,302,765'Catalytic process for producing CF.sub.3 CHClF'1994 5,268,122'Gem-dihydropolyfluoroalkanes and monohydropolyfluoroalkenes, processes for their production, and use of gem-dihydropolyfluoroalkanes in cleaning compositions'1993 5,250,213'1,1,1,2,2,3,3,4,4,5,6-undecafluorohexane and use thereof in compositions and processes for cleaning'1993 5,237,088'Transfer hydrogenation of nitriles using amine donors'1993 5,221,361'Compositions of 1,1,1,2,2,5,5,5,-octafluoro-4-trifluoromethylpentane and use thereof for cleaning solid surfaces'1993 5,216,152'Process for the catalytic pyrolysis of bis(hexamethylene)triamine'1993 5,177,273'Process for the manufacture of halogen-substituted propanes containing hydrogen and at least five fluorine substituents'1993 5,171,890'Process for preparing methyl- and ethyl-substituted primary anilines'1992 5,157,171'Process for chlorofluoropropanes'1992 5,146,018'Hydrogenolysis/dehydrohalogenation process'1992 5,126,484'Process for preparing methyl- and ethyl-substituted primary anilines'1992 5,120,883'Catalytic process for producing CCl.sub.3 CF.sub.3'1992 5,093,527'Process for preparing methyl- and ethyl-substituted primary anilines'1992 5,073,290'Compositions of 1,1,1,2,2,5,5,5-octafluoro-4-trifluormethypentane and use thereof for cleaning solid surfaces'1991 5,068,473'Hydrogenolysis/dehydrohalogenation process'1991 5,030,372'Catalytic equilibration to improve the relative yield of selected halocarbons'1991 RE033549'Process for preparing a mixture of methyl- or ethyl-substituted primary anilines'1991 4,910,351'Process for preparing (polyfluoroalkyl)polyfluoroarenes'1990 4,820,884'Defluorination process using activated carbon'1989 4,820,883'Defluorination process using activated carbon'1989 4,814,522'Catalytic fluoroolefin transhalogenations'1989 4,804,784'Process for preparing methyl- and ethyl-substituted primary anilines'1989 4,754,084'Preparation of substituted fluorobenzenes'1988 4,734,503'Catalytic transhalogenation of haloaromatics'1988 4,593,124'Process for preparing a mixture of methyl- or ethyl-substituted primary anilines'1986 4,313,003'Preparation of dimethylamine'1982 4,254,061'Preparation of monomethylamine'1981 4,164,552'Preparation of hydrogen cyanide'1979 4,136,156'Production of HCN from organic nitriles'1979 4,064,171'Process for preparation of aromatic amines'1977 4,061,685'Catalytic synthesis of phenols'1977 4,059,628'Preparation of aromatic amines'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–2004Patents assigned to DU PONT (34)· patent assignee history

1977–2004Based in Wilmington, DE, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
DU PONT	34	1977–2004

Locations

Location	Patents	Span
Wilmington, Delaware, US	35	1977–2004