Richard C. Cotner — 7 Patents at 3M

Richard C. Cotner has been granted 7 US patents while listed as an inventor at 3M. The first was granted in 1993 and the most recent in February 1996. Richard C. Cotner ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Richard C. Cotner in Stillwater, MN, US.

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
5494776	Hybrid graphic arts films with reduced occurrence of pepper fog	—	1996-02-27	$10,759,000
5493327	Method and apparatus for producing image reproducing materials using photothermographic material sensitive to radiation in the red region and transparent to radiation in the ultraviolet range of the electromagnetic spectrum	William Gordon McCallum	1996-02-20	$11,988,000
5415975	Contrast-promoting agents in graphic arts media	—	1995-05-16	$9,135,000
5364733	Photothermographic elements with novel layer structures, each of which contains a thermally-diffusible oxidizable leuco dye and process for producing a color image from leuco dye	Raymond J. Kenney, Takuzo Ishida	1994-11-15	$5,996,000
5278024	Positive imaging diffusion-transfer dry silver system using formazan dye	David C. Weigel, Kumars Sakizadeh	1994-01-11	$14,918,000
5264321	Photothermographic elements with novel layer structures	Raymond J. Kenney, Takuzo Ishida	1993-11-23	$13,378,000
5206112	Positive imaging diffusion - transfer dry silver system	David C. Weigel, Kumars Sakizadeh	1993-04-27	$15,959,000

Richard C. Cotner — 7 Patents

Issued Patents All Time

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