Cellulase and sodium bicarbonate cleaning solution
CA 2128652 C · Owner: Thetford Corporation · Inventors: Burrows, Mary R.; Johansson, Martha K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition and process for the degradation of fibrous materials is provided. More particularly, a composition comprising cellulase sodium bicarbonate, and citric acid, wherein the combination of sodium bicarbonate and citric acid unexpectedly increases the cellulase activity and thus improves the breakdown oftoilet tissue in waste holding tanks is set forth. The composition of the present invention may also include other additives known to those skilled in the art.
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 July 22, 1994 and granted December 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2016.
- 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.