Leather treatment agent and its use
CA 1285351 C · Owner: Bayer Aktiengesellschaft · Inventors: Dietrich, Manfred; Muller, Hans-Werner; Traubel, Harro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Leather treatment agent and its use, A b s t r a c t Leather treatment agent containing a mixture a) of a carboxylic acid, X - COOH I, wherein X represents, - R-CO-Z-(R'-Z)a b-CO-R-COOH 1 or, -R"-(Z-R')c-Z-CO-R-COOH 2, and the symbols have the meaning described in more detail in the description, and b) of a compound containing at least one primary, secondary or tertiary amino group with, a molecular weight of 200-20,000 are used in processes, for tanning, pretanning retanning, dyeing or fat liquor-, ing pelts or pretanned leather or fully tanned leather. Le A 23 942
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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2008.
- 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.