Spacer for an insulating unit having improved resistance to torsional twist
CA 2185576 C · Owner: Thompson, Albert E. Jr · Inventors: Thompson, Albert E. Jr
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spacer stock and/or spacer frame having a pair of spaced outer legs joined by a base has a strengthening member integral with the base or an insert between the legs to reduce the degree of torsional twist of the spacer stock and/or spacer frame. In one embodiment during the forming of the spacer stock a "T" shaped member is formed integral with the base to reduce the degree of torsional twist.
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 13, 1996 and granted September 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2018.
- 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.