Spacer washer
CA 2216086 C · Owner: Calabrese, Rocco · Inventors: Calabrese, Rocco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The pipe spacer washer according to the invention includes a radially split annular element defined by three mutually hinged semi-annular elements and a snap-on fastening device defined by a tooth and a seat for insertion of the tooth located at, opposite substantially facing circumferential ends of the annular element and for integrally connecting the circumferential ends to define an inner ring housing the pipe and connected in one piece to an outer supporting ring by a number of radial ribs. The washer is made entirely of a single material of a Shore A hardness of over 80, in particular Santoprene R the retaining, tooth is in the form of an asymmetrical arrow and has an inner axially …
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 September 22, 1997 and granted June 6, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 2019.
- 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.