Animal litter, process for preparing animal litter, and method for removal of animal waste
CA 2280846 C · Owner: Mcpherson, Roger E. · Inventors: Mcpherson, Roger E.; Gute, Frank J.; Bishop, Leona E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A grain-based animal litter is disclosed. In accordance with the invention the animal litter comprises discrete plural particles of a grain-based substrate, which particles tend to agglomerate into clumps when wetted. The litter of the invention absorbs liquids such as animal excretions, and substantially reduces the odor thereof. Preferably the , substrate is a grain germ; more preferably the substrate is a , corn germ; most preferably the substrate is washed, spent grain germ. In accordance with a preferred embodiment of the invention the , grain germ is provided in the form of discrete plural granules each of which , granules includes a cohesiveness agent in an amount sufficient to …
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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
- Filed November 25, 1998 and granted March 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 25, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2020.
- 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.