Inventor

William R. Ruhe, Jr.

Inventor

Benicia, CA, US

Overview

1992–2020

Patent span

Chemistry

Primary field (CPC C)

Patents· 47 as inventor

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

C10Mprimary

C10MLubricating compositions29%

C10NIndexing scheme associated with subclass c10m relating to lubricating compositions26%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds21%

C10LFuels not otherwise provided for16%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium4%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds3%

C08LCompositions of macromolecular compounds1%

C09KMaterials for miscellaneous applications, not provided for elsewhere1%

PatentTitleYear

10,815,446Dispersants, method of making, and using same2020 9,994,786Polyester dispersants, synthesis and use thereof2018 9,957,461Polyester dispersants, synthesis and use thereof2018 9,487,731'Functionalized olefin copolymers with monoamine terminated polyether and lubricating oil compositions'2016 9,487,730'Functionalized olefin copolymers with monoamine terminated polyether and lubricating oil compositions'2016 9,347,015'Functionalized olefin copolymers with monoamine terminated polyether lubricating oil compositions'2016 8,455,568'Lubricating oil additive composition and method of making the same'2013 8,183,189'Preparation of a sulfurized molybdenum amide complex and additive compositions having low residual active sulfur'2012 8,076,275'Reduced color molybdenum-containing composition and a method of making same'2011 8,067,347'Lubricating oil additive composition and method of making the same'2011 7,928,044'Lubricating oil additive composition and method of making the same'2011 7,858,566'Lubricating oil additive composition and method of making the same'2010 7,820,604'Lubricating oil additive composition and method of making the same'2010 7,820,605'Lubricating oil additive composition and method of making the same'2010 7,816,309'Lubricating oil additive composition and method of making the same'2010 7,745,542'Lubricating oil additive composition and method of making the same'2010 7,745,541'Lubricating oil additive composition and method of making the same'2010 7,091,306'Process for preparing polyalkenylsuccinimides'2006 6,962,896'Reduced color molybdenum-containing composition and a method of making same'2005 6,958,409'Process for reduced crude sediment in metal salts of hydrocarbyl dithiophosphoric acid'2005 6,906,011'Polymeric dispersants prepared from copolymers of low molecular weight polyisobutene and unsaturated acidic reagent'2005 6,617,396'Process for making polyalkylene/maleic anhydride copolymer'2003 6,451,920'Process for making polyalkylene/maleic anhydride copolymer'2002 6,358,892'Polyalkylene succinimides and post-treated derivatives thereof'2002 6,294,506'Lubricating oils having carbonated sulfurized metal alkyl phenates and carbonated metal alkyl aryl sulfonates'2001 6,156,850'Process for making polyalkenyl derivative of an unsaturated acidic reagent'2000 6,146,431'Polyalkylene polysuccinimides and post-treated derivatives thereof'2000 6,107,450'Polyalkylene succinimides and post-treated derivatives thereof'2000 6,015,776'Polyalkylene polysuccinimides and post-treated derivatives thereof'2000 5,880,070'Cross-linked succinimides from an acid derivative, a polyamine, and a polycarboxylic acid derivative'1999 5,872,083'Post-treated derivatives of polyalkylene succinimides'1999 5,853,434'Fuel compositions having polyalkylene succinimides and preparation thereof'1998 5,851,965'Dispersant compositions having polyalkylene succinimides'1998 5,849,676'Post-treated derivatives of polyalkylene succinimides'1998 5,821,205'Polyalkylene succinimides and post-treated derivatives thereof'1998 5,792,729'Dispersant terpolymers'1998 5,753,597'Polymeric dispersants'1998 5,728,656'Lower-ash lubricating oil having ultra-neutral zinc dialkyldithiophosphates'1998 5,716,912'Polyalkylene succinimides and post-treated derivatives thereof'1998 5,625,004'Two-step thermal process for the preparation of alkenyl succinic anhydride'1997 5,616,668'Polymeric dispersants having polyalkylene and succinic groups'1997 5,565,528'Polymeric dispersants having polyalkylene and succinic groups'1996 5,356,552'Chlorine-free lubricating oils having modified high molecular weight succinimides'1994 5,334,321'Modified high molecular weight succinimides'1994 5,319,030'One-step process for the preparation of alkenyl succinic anhydride'1994 5,286,799'Two-step free radical catalyzed process for the preparation of alkenyl succinic anhydride'1994 5,175,225'Process for preparing polymeric dispersants having alternating polyalkylene and succinic groups'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–1997Patents assigned to CHEVRON RES & TECH (6)· patent assignee history

1992–2020Based in Benicia, CA, US· patent location history

1994–2002Based in Benecia, CA, US· patent location history

1996–2002Patents assigned to CHEVRON CHEM CO (19)· patent assignee history

2003–2020Patents assigned to CHEVRON ORONITE CO (21)· patent assignee history

2011–2013Patents assigned to RUHE JR WILLIAM R (4)· patent assignee history

2012Patents assigned to BHALLA GAURAV (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CHEVRON ORONITE CO	21	2003–2020
CHEVRON CHEM CO	19	1996–2002
CHEVRON RES & TECH	6	1992–1997
RUHE JR WILLIAM Rself	4	2011–2013
BHALLA GAURAV	1	2012

Locations

Location	Patents	Span
Benicia, California, US	41	1992–2020
Benecia, California, US	6	1994–2002