Thickened hypochlorite bleach solution and method of use
CA 2015728 C · Owner: Smith, William L. · Inventors: Smith, William L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A liquid hypochlorite bleach composition and method of use are disclosed with an alkyl ether sulfate as a single surfactant thickening agent in an amount capable of effectively thickening the composition. In another embodiment of a hypochlorite bleach composition and method of use, the composition comprises an alkyl ether sulfate in a thickening effective amount and a bleach stable cosurfactant system in an amount equal to 0-50% by wt. of the amount of the alkyl ether sulfate.
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 30, 1990 and granted November 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2012.
- 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.