Expired Canadian patentCanada
Encapsulated breaker for cross-linked acid gel, fracture acidizing fluid containing same and method of use thereof
CA 1291867 C · Owner: Jacobs, Irwin C. · Inventors: Jacobs, Irwin C.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fracture acidizing fluids are provided containing an encapsulated breaker which releases breaker at a regulated rate over time.
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 November 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 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.
FiledOctober 19, 1987
GrantedNovember 12, 1991
Term endedNovember 12, 2008
Patent numberCA 1291867 C
Classification (IPC)E21B43/26 +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.