Superconducting metal oxide compositions and processes for manufacture and use
CA 2064232 C · Owner: E.I. Du Pont De Nemours And Company · Inventors: Subramanian, Munirpallam Appadorai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions having the formula Tl1-x Bi x Sr2Ca2Cu3O9 wherein x is from about 3/20 to about 11/20 are superconducting with transition temperatures above 110 K. Processes for making and using the compositions of the invention are provided.
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 July 17, 1990 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 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.
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.