Stahlhofen; Paul

Patent Applications and Registrations

Patent applications and USPTO patent grants for Stahlhofen; Paul.The latest application filed is for "photosensitive mixture containing an ester or amide of 1,2-naphthoquinone diazide sulfonic or carboxylic acid, a phenolic binder resin and a bis-(4-hydroxyphenyl) speed enhancing compound".

Company Profile

0.16.0

Stahlhofen; Paul - Wiesbaden DE

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Photosensitive mixture containing an ester or amide of 1,2-naphthoquinone diazide sulfonic or carboxylic acid, a phenolic binder resin and a bis-(4-hydroxyphenyl) speed enhancing compound Grant 5,225,310 - Stahlhofen , et al. July 6, 1	1993-07-06
Process for preparing photographic elements utilizing light-sensitive layer containing cyclical acid amide thermo-crosslinking compound Grant 5,084,372 - Hsieh , et al. January 28, 1	1992-01-28
Light-sensitive mixture for producing positive or negative relief copies Grant 5,070,001 - Stahlhofen December 3, 1	1991-12-03
Light-sensitive positive copying material with alkali soluble polycondensation binder Grant 4,642,282 - Stahlhofen February 10, 1	1987-02-10
Light-sensitive compound mixture and copying material comprising o-naphthquinonediazide compound Grant 4,628,020 - Stahlhofen December 9, 1	1986-12-09
Light-sensitive copying material with o-quinone diazide and phenolic hydroxy compound Grant 4,594,306 - Stahlhofen , et al. June 10, 1	1986-06-10
Process for producing negative copies in a material based on 1,2-quinone diazides with thermal curing agent Grant 4,581,321 - Stahlhofen April 8, 1	1986-04-08
Process for producing negative copies by means of a material based on 1,2-quinone diazides with 4-ester or amide substitution Grant 4,576,901 - Stahlhofen , et al. March 18, 1	1986-03-18
Light-sensitive mixture based on O-naphthoquinone-diazides, and light-sensitive copying material prepared therefrom Grant 4,517,275 - Stahlhofen May 14, 1	1985-05-14
Light-sensitive mixture and light-sensitive copying material prepared therefrom wherein image produced therein is visible under yellow safety light Grant 4,458,000 - Stahlhofen July 3, 1	1984-07-03
Light-sensitive mixture and copying material prepared therefrom with novolak having brominated phenol units Grant 4,404,272 - Stahlhofen September 13, 1	1983-09-13
Light-sensitive mixture and copying material prepared therefrom, and process for the preparation of a printing form from the copying material Grant 4,387,152 - Stahlhofen June 7, 1	1983-06-07
Light-sensitive mixture and copying material produced therefrom Grant 4,275,139 - Stahlhofen June 23, 1	1981-06-23
Photosensitive copying composition Grant 4,266,000 - Stahlhofen , et al. May 5, 1	1981-05-05
Photosensitive composition Grant 4,163,672 - Stahlhofen August 7, 1	1979-08-07
Photosensitive composition Grant 4,160,671 - Stahlhofen July 10, 1	1979-07-10

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