Process for obtaining pure orthophosphoric acid from superphosphoric acid
CA 1066020 A · Owner: Texasgulf Inc. · Inventors: Whitehurst, Brooks M.; Jernigan, John D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for obtaining pure orthophosphoric acid from superphosphoric acid is provided comprising crystallizing pure orthophosphoric acid from superphosphoric acid which has been hydrolized to a mixture of orthophosphoric acid having a P2O5 content of from about 65% to 70% and a polyphosphoric acid having a poly P2O5 content in the approximate range of 1% to 15%.
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
- Granted November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 1996.
- 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.