No grow gas spring
CA 1305499 C · Owner: Holley, David M. · Inventors: Holley, David M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas spring with a piston rod slidably received in a cylinder with a chamber which is charged with a compressed gas. A positive stop is removably received in the cylinder to limit the extent to which the rod can be extended independently of a bearing and seal assembly in the chamber in which the rod is slidably received. An end cap with a filler valve therein is removably received and releasably retained in the cylinder adjacent its other end.
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 July 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 2009.
- 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.