Sulfonylacetate activator-stabilizer precursor
CA 1099137 A · Owner: Eastman Kodak Company · Inventors: Ling, Hans G.; Merkel, Paul B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An activator-stabilizer precursor compound having an acid portion which is an alpha-sulfonylacetate is useful in a photographic composition which is responsive to heat for processing. The activator-stabilizer precursors are characterized in that their acid byproducts have reduced toxicity and volatility and are substantially inert in a processed photographic element. - 1 -
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.