Inventor

STAHLHOFEN PAUL

DE34 patents

⚠️ This page may combine multiple inventors who share the name “STAHLHOFEN PAUL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

STAHLHOFEN PAUL

HOECHST AG

Light-sensitive mixture for producing positive or negative relief copies

Process for producing images on a photosensitive material

Photosensitive composition and photosensitive copying material prepared therefrom wherein composition has a thermal crosslinking urethane formaldehyde condensate

Gumming solution for use in the burning-in of offset-printing plates comprising water, a hydrophilic polymer and an organic acid derivative

Light-sensitive positive copying material with alkali soluble polycondensation binder

Process for producing negative copies in a material based on 1,2-quinone diazides with thermal curing agent

Process for producing negative copies by means of a material based on 1,2-quinone diazides with 4-ester or amide substitution

Light-sensitive mixture comprising O-naphthoquinone-diazides and light sensitive copying material prepared therefrom

Light-sensitive mixture and copying material prepared therefrom with novolak having brominated phenol units

Light-sensitive mixture and copying material prepared therefrom, and process for the preparation of a printing form from the copying material

Light-sensitive mixture and copying material produced therefrom

Light-sensitive o-quinone diazide containing copying layer

Light-sensitive mixture and light-sensitive copying material prepared therefrom wherein image produced therein is visible under yellow safety light

Photosensitive composition

Light-sensitive copying material with o-quinone diazide and phenolic hydroxy compound

Process of producing negative relief copies utilizing photosensitive copying material with thermal hardening triazine compound

Burn-in gumming composition for offset printing plates

Light-sensitive mixture, recording material prepared therefrom and process for use thereof

Light-sensitive compound, light-sensitive mixture, and light-sensitive copying material prepared therefrom with 0-naphthoquinone diazide compound

Light-sensitive compound mixture and copying material comprising o-naphthquinonediazide compound

Light-sensitive, positive-working copying material having a rough surface provided by pigments in light-sensitive layer

Light-sensitive mixture based on O-naphthoquinone-diazides, and light-sensitive copying material prepared therefrom

Light-sensitive 1,2 quinone diazide containing mixture and light-sensitive copying material prepared therefrom wherein imaged produced therein is visible under yellow safety light

Light-sensitive mixture based on O-naphthoquinone diazide ester of condensate of bisphenol and formaldehyde and light-sensitive copying material prepared therefrom

Light-sensitive compounds, light-sensitive mixture, and light-sensitive copying material prepared therefrom

Photosensitive composition

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

Photosensitive copying composition

Photosensitive composition, photosensitive copying material prepared from this composition with thermal hardening symmetric triazine alkyl(aryl)-ether

Burn-in gumming composition for offset printing plates

Process for the production of negative relief copies utilizing reversal processing

Light-sensitive mixture based on 1,2-naphthoquinone-diazides, and reproduction material produced with this mixture

HOECHST CELANESE CORP

Copying materials

Process for preparing photographic elements utilizing light-sensitive layer containing cyclical acid amide thermo-crosslinking compound