Richard L. Danforth has been granted 15 US patents while listed as an inventor at Shell Oil Compny . The first was granted in 1983 and the most recent in April 2000. Richard L. Danforth ranks #307,048 of 4,157,543 US inventors in our database (top 7.4%). Patent records list Richard L. Danforth in Missouri City, TX, US.
Patents per Year Patents granted per year, 1983 to 2000 Bar chart with a peak of 6 patents in 1989. peak 6 1983: 1 patents 1983 1985: 1 patents 1985 1988: 1 patents 1988 1989: 6 patents 1989 1990: 3 patents 1990 1991: 1 patents 1991 1993: 1 patents 1993 2000: 1 patents 2000
Issued Patents All Time
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Showing 1–15 of 15 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
6051323 Multilayer polyketone structures Carlton E. Ash , Dixie G. Waters 2000-04-18
5256335 Conductive polyketone polymers Paul Byrd 1993-10-26
H917 Polymer blend William P. Gergen , Robert G. Lutz 1991-05-07
4937021 Laminated billet process William H. Korcz 1990-06-26
4935304 Wire and cable coating of non-blended linear alternating polyketone polymer and blend of the polyketone with polyurethane polymer — 1990-06-19
4921897 Flame retardant composition containing zinc borate Darlene Smith 1990-05-01
4885318 Polyketone flame retardant composition Darlene Smith 1989-12-05
4885328 Flame retardant compositions Darlene Smith 1989-12-05
4874801 Polymer blend Eric R. George , Paul Byrd 1989-10-17
4869966 Encapsulated assemblage and method of making Gay M. Samuelson , David J. St. Clair 1989-09-26
4851482 Blends and articles of linear alternating polyketone polymer with polyurethane polymer Dale L. Handlin, Jr. , William P. Gergen , Robert G. Lutz 1989-07-25
4820578 Polyketone roofing membranes Dennis W. Gilmore 1989-04-11
4749430 Method of making an encapsulated assemblage Gay M. Samuelson , David J. St. Clair 1988-06-07
4493919 Polymer blend composition comprising two block polymers a vinyl aromatic copolymer and a polyester Daniel P. Durbin , Robert G. Lutz 1985-01-15
$15,036,000
4377647 Polymer blend composition Daniel P. Durbin , Robert G. Lutz 1983-03-22
$17,793,000
