Spacer frame for an insulating unit having strengthened sidewalls to resist torsional twist
CA 2213026 C · Owner: Ppg Industries, Inc. · Inventors: Gallagher, Raymond G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An insulating unit having low thermal conducting marginal edge portions includes a pair of glass sheets maintained in a fixed spaced relationship by an edge assembly. The edge assembly includes a spacer frame having a moisture impervious adhesive sealant on outer surface of each of the outer legs and base interconnecting the outer legs. The spacer frame is made by joining sections of spacer stock or bending a continuous section of spacer stock. The spacer stock has a pair of outer legs joined by the base to provide the spacer stock with a generally U-shaped cross section. The outer legs are formed e.g. each leg has a pair of members having a hairpin cross section to reduce the degree of …
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 August 26, 1997 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2019.
- 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.