Absorbents containing activated carbons
CA 2201690 C · Owner: Macpherson, Jack A. · Inventors: Dorsey, Robert T.; Maxwell, Jason R.; Macpherson, Jack A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The instant invention generally relates to absorbents containing effective odor absorbing amounts of activated carbon. The activated carbon-containing absorbents may also be formed in conjunction with a wide variety of adsorbent materials including bentonite opaline silica and the like and are suitable for use as absorbents in a wide variety of absorbent application and are particulary well suited for use as animal litters. Such absorbent may also contain fluoropolymer dedusting agents and bactericides to form unique absorbent compositions with diverse properties and uses.
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 April 3, 1997 and granted June 5, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2019.
- 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.