Sheet metal nail for securing coverings to cementitious materials
CA 1069738 A · Owner: W.R. Grace And Co. · Inventors: Wright, John L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved fastener of the sheet metal type for anchoring coverings to soft, not-fully cured cementitious masses has a head or cap, portion and a hollow shank portion comprised of a pair of generally Ushaped, opposed legs, one leg being substantially fully enclosed within the other, one such leg being rigidly fixed to said head the other leg, being hingedly connected to the head whereby the rigid leg ensures proper alignment of the head with the surface of the covering material and the hinged leg is caused to spread upon installation and thereby lock the fastener within the cementitious mass.
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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- 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.