Method of obtaining natural leather with hair for warm unlined shoes
CA 1107088 A · Owner: Yakutsky Kozhevenno-Obuvnoi Kombinat · Inventors: Vasiliev, Nikolai V.; Ponomarev, Alexandr I.; Belyansky, Oleg M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The method of obtaining the leather resides in the treatment of cattle hides and includes the following successively performed operations: pretreating a raw hide 9 splitting it longitudinally to the thickness of 200 to 2.5 mm of the leather tissue, flushing the thus obtained grain split in an aqueous solution containing surface-active agents and ferments, pickling, tanning shaving, greasing, drying, rolling, stretching and grinding. All the above operations are performed with the hair remaining on the unfinished leather. As a result of the disclosed treatment there is obtained the leather with hair and with the suede finish of the flesh side. The leather is suitable for production of warm …
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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 August 18, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 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.