Compositions and methods for waterproofing structures formed from water-penetrable construction materials
CA 2017530 C · Owner: Wiercinski, Robert A. · Inventors: Gaidis, James M.; Wiercinski, Robert A.; Ehrlich, Susan G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are compositions and methods of reducing water penetration through civil engineering structures which methods comprise applying to the structures a waterproofing agent pretreatment composition including SBR latex, SBS latex, natural rubber latex polybutadiene, latex, polychloroprene latex polyvinyl acetate latex, nitrile latex or combinations thereof, and optionally may include various freezing point depressing agents to enable use of the compositions and methods at or below 25°F. Also disclosed are packages including the latex-containing waterproofing agent pretreatment compositions and waterproofing agents.
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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 May 25, 1990 and granted December 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 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.