Expired Canadian patentCanada
Timed release composition and means
CA 1262525 C · Owner: Sjogren, Robert D. · Inventors: Sjogren, Robert D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A controlled slow release pest control composition comprising an encapsulated pesticide, carbon and plaster. Also a controlled slow release fertilizer composition comprising an encapsulated fertilizer, carbon and plaster.
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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 October 31, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 31, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 5, 1984
GrantedOctober 31, 1989
Term endedOctober 31, 2006
Patent numberCA 1262525 C
Classification (IPC)A01N25/34 +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.