Inventor

Wayne R. Pretzer

Inventor

Gibsonia, PA, US

Overview

1979–2007

Patent span

Chemistry

Primary field (CPC C)

Patents· 41 as inventor

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

C07Cprimary

C07CAcyclic or carbocyclic compounds30%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry15%

Y02PClimate change mitigation technologies in the production or processing of goods7%

C09KMaterials for miscellaneous applications, not provided for elsewhere5%

E21BEarth or rock drilling5%

Y10TTechnical subjects covered by former us classification5%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds4%

C08LCompositions of macromolecular compounds4%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%

B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form3%

PatentTitleYear

7,285,675'N-hydroxyalkyltrimellitimide esters and bis-(trimellitimide) esters and method of making'2007 6,555,226'Polyester resin for powder coating'2003 6,437,087'Polyester resin for powder coating'2002 6,020,455'Vinyl cyclohexanediol containing resin compositions'2000 5,525,426'Poly(vinylalkylether)-containing hot-melt adhesives for polyethylene and polypropylene'1996 5,359,006'Poly(vinylalkylether)-containing hot melt adhesives for polyethllene and polypropylene'1994 5,081,250'Regiospecific carbonylation process for making acyl compounds from aromatic heterocycles and olefins'1992 5,080,978'Poly(vinylalkylether)-containing hot-melt adhesives for polyethylene and polypropylene'1992 5,045,220'Increasing the viscosity of CO.sub.2 solutions'1991 5,022,467'Polymer containing pendant silyl ether groups useful in enhanced oil recovery using CO.sub.2 flooding'1991 4,945,989'Polymer containing pendant tertiary alkyl amine groups useful in enhanced oil recovery using CO.sub.2 flooding'1990 4,945,990'Polymer containing pendant vinyl ether groups useful in enhanced oil recovery using CO.sub.2 flooding'1990 4,913,235'Enhanced oil recovery using CO.sub.2 flooding'1990 4,447,557'Process for selective formation of C4 compounds and thiol-containing catalyst system used therein'1984 4,438,020'Catalyst suitable for preparing aldehydes'1984 4,411,820'Catalyst and process for preparing organic urethanes'1983 4,409,404'Process for producing ethanol using said novel catalyst system'1983 4,361,706'Process for preparing aldehydes'1982 4,361,707'Process for producing aldehydes'1982 4,352,947'Process for producing ethanol'1982 4,352,946'Process for producing ethanol'1982 4,346,020'Novel catalyst system and process for producing ethanol using said novel catalyst system'1982 4,339,609'Process for selective formation of C.sub.4 compounds and biphosphine disulfide-containing catalyst system used therein'1982 4,339,610'Process for selective formation of C.sub.4 compounds and thiol-containing catalyst system used therein'1982 4,339,611'Process for selective formation of C.sub.4 compounds and organic sulfide-containing catalyst system used therein'1982 4,339,608'Process for selective formation of C.sub.4 compounds and tertiary organo group VA compound-containing catalyst system used therein'1982 4,331,560'Catalyst and process for preparing organic isocyanates'1982 4,297,518'Decomposition of cumene hydroperoxide with a homogeneous catalyst'1981 4,267,379'Decomposition of cumene hydroperoxide and recovery of boron trifluoride catalyst'1981 4,267,380'Decomposition of cumene hydroperoxide using a Lewis acid catalyst'1981 4,239,705'Process for producing acetaldehyde'1980 4,239,925'Ethanol from methanol'1980 4,239,924'Ethanol from methanol'1980 4,239,704'Process for producing acetaldehyde'1980 4,238,417'Decomposition of cumene hydroperoxide and recovery of boron trifluoride catalyst'1980 4,210,607'Decomposition of cumene hydroperoxide using a stable nitrosonium or nitronium salt as the catalyst'1980 4,210,606'Decomposition of cumene hydroperoxide with a halogen-substituted thiophenol catalyst'1980 4,209,465'Decomposition of cumene hydroperoxide using a stable carbonium, tropylium or oxonium salt as the catalyst'1980 4,173,587'Decomposition of cumene hydroperoxide with a heterogeneous catalyst'1979 4,151,208'Process for the selective preparation of acetaldehyde from methanol and synthesis gas'1979 4,133,966'Selective formation of ethanol from methanol, hydrogen and carbon monoxide'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1984Patents assigned to GULF RESEARCH DEVELOPMENT CO (28)· patent assignee history

1979–1981Based in Oakmont, PA, US· patent location history

1980–1984Based in Gibsonia, PA, US· patent location history

1990–1991Patents assigned to CHEVRON RES (5)· patent assignee history

1990–2007Based in Wheaton, IL, US· patent location history

1992–1996Patents assigned to AMOCO CORP (4)· patent assignee history

2000Patents assigned to BP AMOCO CORP (1)· patent assignee history

2002–2003Patents assigned to BP CORP NORTH AMERICA INC (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
GULF RESEARCH DEVELOPMENT CO	28	1979–1984
CHEVRON RES	5	1990–1991
AMOCO CORP	4	1992–1996
BP CORP NORTH AMERICA INC	2	2002–2003
BP AMOCO CORP	1	2000

Locations

Location	Patents	Span
Gibsonia, Pennsylvania, US	24	1980–1984
Wheaton, Illinois, US	13	1990–2007
Oakmont, Pennsylvania, US	4	1979–1981