Expired Canadian patentCanada
Product and process for increasing enzyme adsorption
CA 1281675 C · Owner: Harris, Donald W. · Inventors: Harris, Donald W.; Antrim, Richard L.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a process for increasing the adsorption capacity of DEAE-cellulose composites by subjecting the compounds to one or more treatments in an aqueous medium at an elevated temperature.
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 March 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 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.
FiledJanuary 21, 1986
GrantedMarch 19, 1991
Term endedMarch 19, 2008
Patent numberCA 1281675 C
Classification (IPC)C12N11/12 +2 more
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.