Roof coating composition and construction
CA 1099474 A · Owner: Global Coatings Limited · Inventors: Kaufmann, John H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roofing shingle having an elongated body of synthetic plastic foam tapering from a major thickness adjacent the leading face to a minor thickness adjacent a trailing face. The body has each end shaped to interfit with a complementary end of an adjacent shingle. The leading face is shaped to interfit with the trailing margin of adjacent trailing shingles. Preferably, one end has a flange and the other end a recess to receive the flange of the adjacent shingle and the leading face has a recess to receive the trailing margin of the adjacent shingle. The shingles may be fitted together to apply an insulating blanket to a roof deck. Preferably, the shingles are aligned in rows and the shingles …
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 April 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 1998.
- 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.