Water imbibing tablet, briquette and capsule containing growth enhancing medias and water retentive copolymers used in forestry or agriculture
CA 2000640 A1 · Owner: Turpin, Kenneth A. · Inventors: Turpin, Kenneth A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tableted plant or seed growth media which incorporates various forestry or agricultural fertilizers minerals and nutrients for enhanced growth. Also present are various water-retentive polymers such as cross-linked polyacrylamide, hydroxypropyl methylcellulose and microcrystalline cellulose.
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
- Filed October 13, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2011.
- 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.