Roofing composition
CA 1298007 C · Owner: Futamura, Shingo · Inventors: Futamura, Shingo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roofing composition comprising a blend of a thermoplastic elastomer containing at least two polymer blocks wherein one of said polymer blocks is a crystalline polymer block and one of said polymer blocks is an amorphous polymer block, and a vulcanizable elastomer selected from the group consisting of EPDM, butyl, neutralized sulfonated EPDM neutralized, sulfonated butyl and mixtures thereof. The roofing compositions have particular application as roofing membranes (i.e. roof sheeting) or roof flashing materials. FJT:5176B/t
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 March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
- 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.