Polymeric composition for dampproofing walls
CA 2217307 A1 · Owner: Roberts, Michael G. Jr. · Inventors: Roberts, Michael G. Sr.; Roberts, Michael G. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dampproofing composition comprising from about 25 to about 80 parts by weight of a polymer based compound from about 15 to about 70 parts, by weight of a solvent and from about 5 to about 60 parts by weight of a processing oil, to total about 100 parts by weight wherein the solvent producesa substantially homogeneous solution.
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 September 29, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 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.