Thermoplastic asphaltic composition
CA 1321275 C · Owner: Nova Husky Research Corporation · Inventors: Zanzotto, Ludo; Watson, R. David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition of matter comprising asphalt polyethylene, and ethylene-vinyl acetate copolymer and particularly a composition wherein there is present from about 85% to about 30% w/w of asphalt, from about 10% to about 50% w/w of polyethylene and from about 5% to about 40% w/w of ethylene-vinyl acetate copolymer. Such a composition is useful as a waterproofing agent and may be used as a waterproofing membrane in roofing, canal lining and pond lining. It can also be used in road construction.
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
- Granted August 10, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 10, 2010.
- 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.