Canadian application, no grantCanada
Glass-metal seals
CA 2018985 A1 · Owner: Lessar, Joseph F. · Inventors: Lessar, Joseph F.; Weiss, Douglas; Taylor, William J.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Boroaluminasilicate glasses and blended compositions thereof with aluminum-silicate glasses as seals in feedthroughs.
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 June 14, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 14, 1990
GrantedNo grant recorded
Term endedJune 14, 2010
Patent numberCA 2018985 A1
Classification (IPC)C03C27/02 +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.