Edible collagen casing
CA 1071012 A · Owner: Tee-Pak · Inventors: Burke, Noel I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the manufacture of an edible collagen casing hide colla-, gen is formed into a slurry swollen with acid, and extruded as, a thin-walled hollow tube into a coagulation bath. The extruded casing is subsequently tanned or hardened in an aluminum sulfate tanning bath followed by treatment with a dilute solution of glutaraldehyde. The casing is washed, plasticized and dried. A substantial improvement in the shirring of the casing is obtained when the gel casing is treated with an aqueous solution containing at least 0.002% (and preferably 0.05 - 0.15%) sodium dihydrogen phosphate, neutralized to pH 6.0 - 8.0 subsequent, to the glutaraldehyde treatment and prior to drying of the casing.
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 February 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 1997.
- 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.