Sealant for concrete or cinder block walls
CA 2024045 A1 · Owner: Holstein, C. Dempsey · Inventors: Chervenak, Raymond R.; Holstein, C. Dempsey; Shean, Timothy J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition for use as a sealant or coating for concrete block walls is disclosed which includes water soluble silicate water, fibers, clay and limestone, wherein the limestone accelerates the drying of the composition. The fibers used may be non-allergenic fibers such as polyethylene or polypropylene fibers. A method of using the sealant composition also is disclosed.
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 August 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 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.