Robert R. Grinstead — 12 Patents

Robert R. Grinstead has been granted 12 US patents. The first was granted in 1981 and the most recent in February 2003. Robert R. Grinstead ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list Robert R. Grinstead in Walnut Creek, CA, US.

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6524330	Method of ocular treatment	Bahram Khoobehi, Gholam A. Peyman	2003-02-25
4976866	Concentric tubular membrane device and process useful in ion exchange or absorbent processes	H. Hunter Paalman	1990-12-11	$6,719,000
4910002	Cyclic process for the removal of NO.sub.x and SO.sub.x from gas streams using a water-soluble, polymeric chelate of a polyvalent metal and membrane separation means	—	1990-03-20	$3,909,000
4859437	Process for the removal of H2S from fluid streams using a water soluble polymeric chelate of an oxidizing polyvalent metal	—	1989-08-22	$6,295,000
4808385	Process for the removal of H.sub.2 S from fluid streams using a water soluble polymeric chelate of an oxidizing polyvalent metal	—	1989-02-28	$2,964,000
4778664	Process for the removal of NO from fluid streams using a water soluble polymeric chelate of a polyvalent metal	—	1988-10-18	$10,127,000
4755298	Process for removing boron ions from aqueous solutions	—	1988-07-05	$6,397,000
4741831	Process and composition for removal of metal ions from aqueous solutions	—	1988-05-03	$5,343,000
4708854	Process for the removal of NO from fluid streams using a water-soluble polymeric chelate of a polyvalent metal	—	1987-11-24	$6,815,000
4451375	Iodine adsorption via picolylamine ion exchange resins	—	1984-05-29	$2,134,000
4382872	Metallurgical extractant system	—	1983-05-10	$5,622,000
4254087	Extraction of copper, nickel and cobalt using alkylaromatic sulfonic acids and chelating amines	—	1981-03-03	$4,671,000

Robert R. Grinstead — 12 Patents

Issued Patents All Time

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