Low density aluminum lithium alloy
CA 2103908 C · Owner: Reynolds Metals Company · Inventors: Balmuth, Edward S.; Skillingberg, Michael H.; Rainen, Richard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aluminum based alloy primarily for use in aircraft and aerospace components consists essentially of the composition: 2.60 to 3.30 weight percent copper 0.0 to, 0.50 weight percent manganese, 1.30 to 1.65 weight percent lithium, 0.0 to 1.8 percent magnesium and from 0.0 to 1.5 weight percent of grain refinement elements selected from the group consisting of zirconium, and chromium. Up to about 0.5 wt.% zinc and up to about 1.5 wt.% titanium may also be present. Minor impurities may also be present. These alloys exhibit an improved combination of characteristics including low density, high strength high, corrosion resistance and good fracture toughness.
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 February 18, 1992 and granted June 18, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2014.
- 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.