Means for attaching sheet material to a substrate
CA 1301496 C · Owner: Dunlop Construction Products Inc. · Inventors: Hrysko, Paul W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fastening disk for use in attaching sheet material to a substrate, comprising:-, (a) a disk plate with a substantially discoid concave proximal surface for positioning facing the sheet material to be attached, (b) concentric inner and outer tubular posts extending from the distal surface of the disk plate, (c) radial struts connecting the inner and outer posts and, (d) radial vanes on the distal surface of the disk plate between the outer post and the periphery of the disk plate the disk being compressible to reduce the concavity of the disk plate. Also, means for attaching sheet material to a substrate comprising said fastening disk, a pliable gasket for positioning between the proximal …
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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.