Inventor
Gavin G. Spence
Inventor
New Castle, DE, US
Overview
Patents· 24 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
D21Hprimary
D21HPulp compositions46%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds40%
Y10TTechnical subjects covered by former us classification8%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments2%
C09DCoating compositions, e.g. paints, varnishes or lacquers2%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests2%
PatentTitleYear
6,387,215'Use of acrylamide copolymer to reduce stickies deposits'20026,077,394'Retention and drainage in alkaline fine paper'20005,674,362'Method for imparting strength to paper'19974,483,959'Organic pigments'19844,469,555'Organic pigments'19844,456,724'Organic pigments'19844,434,267'Organic pigments'19844,426,483'Organic pigments'19844,414,353'Organic pigments'19834,404,310'Organic pigments'19834,403,062'Organic pigments'19834,403,063'Organic pigments'19834,369,292'Organic pigments'19834,353,818'Organic pigments'19824,349,641'Organic pigments'19824,348,257'Organic pigments'19824,343,729'Organic pigments'19824,311,809'Organic pigments'19824,293,666'Organic pigments'19814,293,667'Organic pigments'19814,282,060'Organic pigments'19814,281,082'Organic pigments'19814,235,982'Organic pigments'19804,196,253'Paper coated with binder and organic pigment particles'1980Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1980–1984Patents assigned to HERCULES INC (21)· patent assignee history
1980–1984Based in New Castle, DE, US· patent location history
1982Based in Newark, DE, US· patent location history
1997Patents assigned to CALLAWAY CORP (1)· patent assignee history
1997–2002Based in Columbus, GA, US· patent location history
2000–2002Patents assigned to CALLAWAY CHEMICAL CORP (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HERCULES INC | 21 | 1980–1984 |
| CALLAWAY CHEMICAL CORP | 2 | 2000–2002 |
| CALLAWAY CORP | 1 | 1997 |
Locations
| Location | Patents | Span |
|---|---|---|
| New Castle, Delaware, US | 20 | 1980–1984 |
| Columbus, Georgia, US | 3 | 1997–2002 |
| Newark, Delaware, US | 1 | 1982 |