Cast plunger can and spring compressor
CA 2067869 C · Owner: Robert L. Parham And Patricia L. Parham, Trustees, Or Their Successors I N Trust, Under The Parham Family Trust Dated August 29, 2000, And Any Am · Inventors: Parham, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A substantially one-piece cast plunger can structure and a mated spring compressor system. The plunger can includes a removable plunger bearing on one end that is attached to the plunger can with both interlocking lugs and bolts and is designed for removal with a spring compressor that holds it in place.
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 May 1, 1992 and granted October 13, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 1, 2014.
- 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.