Expired Canadian patentCanada
Method of manufacturing metal rupture discs
CA 1304650 C · Owner: Muddiman, George R. · Inventors: Muddiman, George R.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a method of creating lines of weakness in rupture discs using a laser beam to, provide improved results for consistency for the lines of weakness compared to conventional mechanical methods.
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 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 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.
FiledAugust 27, 1987
GrantedJuly 7, 1992
Term endedJuly 7, 2009
Patent numberCA 1304650 C
Classification (IPC)F16K17/40 +2 more
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.