Metal fastener and method of manufacture
CA 1255180 A · Owner: Pci Group, Inc. · Inventors: Pendleton, Richard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of making a fastener from a sheet of material characterized by the steps of forming opposed offset circular openings in the material. Opposed circular head end portions are formed surrounding the openings. Opposed offset elongated prong portions extend from the opposed periphery of the head end portions. The prong portions are lanced to form inner and outer prongs. The inner prong is displaced out of the plane of the surface of the outer prong to facilitate separation of the prongs. The periphery of the circular openings is displaced out of the surface of the material to form a sunburst. The stock between the opposed prong portions is removed and the completed fastener is also …
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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 June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- 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.