Method of making collagen fibers for surgical use
CA 1161209 A · Owner: Chemokol Gesellschaft Zur Entwicklung Von Kollagenprodukten · Inventors: Steffan, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for the manufacture of collagen fibers for surgical purposes, in which Achilles tendons or hides from cottle are decomposed in an alkaline medium and are mechanically treated after treatment with an acid, deswelled cross-, linked and dried, wherein the Achilles tendons are decomposed in an alkaline medium to an amino-nitrogen content of from 0.15 to 0.30 µmoles/ g and after a hydrochloric acid treatment and washing to a pH value of from 2 to 4, the swollen collagen substance is reduced in thickness under pressure forming a two-dimensional network, then the individual longitudinal fibers are exposed by hackling, and then, after deswelling the, fibers are cross-linked …
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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 January 31, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 31, 2001.
- 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.