A fastener having a protective coating and a method of providing same
CA 2306356 A1 · Owner: Zakrzewski, Henry · Inventors: Zakrzewski, Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a method of manufacturing a fastener adapted for being driven, into a material in use and which has a protective coating for inhibiting corrosion of the, fastener. The method comprises forming the fastener from a length of metal and heating, the fastener to a desired temperature prior to immersing the heated fastener in a solution, containing a passivating agent and one or more polymeric substances. The fastener is, subsequently removed from the solution and remaining solution on the fastener is, allowed to dry to thereby form the protective coating. There is also provided a fastener, manufactured by the method.
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
- Filed April 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2022.
- 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.