Gavin G. Spence — 24 Patents at Hercules

Gavin G. Spence has been granted 24 US patents while listed as an inventor at Hercules. The first was granted in 1980 and the most recent in May 2002. Gavin G. Spence ranks #168,038 of 4,157,543 US inventors in our database (top 4.0%). Patent records list Gavin G. Spence in Middletown, DE, US.

Issued Patents All Time

Showing 1–24 of 24 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6387215	Use of acrylamide copolymer to reduce stickies deposits	Alan J. Schellhamer, Stephen R. Kurowsky	2002-05-14
6077394	Retention and drainage in alkaline fine paper	Duane R. Palmateer, James R. Yarnell	2000-06-20
5674362	Method for imparting strength to paper	Richard T. Underwood, Robert J. Jasion, Stephen P. Hoke	1997-10-07	$21,208,000
4483959	Organic pigments	William W. Maslanka	1984-11-20	$8,884,000
4469555	Organic pigments	William W. Maslanka	1984-09-04	$4,794,000
4456724	Organic pigments	William W. Maslanka	1984-06-26	$8,051,000
4434267	Organic pigments	William W. Maslanka	1984-02-28	$9,146,000
4426483	Organic pigments	William W. Maslanka	1984-01-17	$11,065,000
4414353	Organic pigments	William W. Maslanka	1983-11-08	$9,755,000
4404310	Organic pigments	William W. Maslanka	1983-09-13	$3,392,000
4403062	Organic pigments	William W. Maslanka	1983-09-06	$5,419,000
4403063	Organic pigments	William W. Maslanka	1983-09-06	$5,419,000
4369292	Organic pigments	William W. Maslanka	1983-01-18	$8,145,000
4353818	Organic pigments	William W. Maslanka	1982-10-12	$2,197,000
4349641	Organic pigments	William W. Maslanka	1982-09-14	$5,733,000
4348257	Organic pigments	William W. Maslanka	1982-09-07	$1,706,000
4343729	Organic pigments	William W. Maslanka	1982-08-10	$4,165,000
4311809	Organic pigments	William W. Maslanka	1982-01-19	$5,122,000
4293666	Organic pigments	William W. Maslanka	1981-10-06	$2,661,000
4293667	Organic pigments	William W. Maslanka	1981-10-06	$2,661,000
4282060	Organic pigments	William W. Maslanka	1981-08-04	$3,293,000
4281082	Organic pigments	William W. Maslanka	1981-07-28	$7,295,000
4235982	Organic pigments	William W. Maslanka	1980-11-25	$6,483,000
4196253	Paper coated with binder and organic pigment particles	—	1980-04-01	$3,419,000

Gavin G. Spence — 24 Patents

Issued Patents All Time

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