Process for swelling collagen with mixed acids
CA 1084331 A · Owner: Teepak, Inc. · Inventors: Burke, Noel I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aqueous dispersions of swollen hide collagen suitable for extrusion into tubular food casings are prepared by dispersing finely comminuted collagen particles at a concentration of 2-8% by weight in water. Swelling of the collagen particles is effected by adjusting the pH of the dispersion to between 2.5 to 3.7 with a mixture of a strong acid having a dissociation constant in water at 25°C of greater than 1 x 10-3 e.g.; sulfuric acid, and, a weak acid having a dissociation constant in water at 25°C between 1 x 10-6 to 1 x 10-3, e.g. lactic acid.
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 August 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 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.