Colorless ferric alkylphosphates
CA 1312873 C · Owner: Whitcomb, David R. · Inventors: Whitcomb, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed novel colorless ferric di-alkylphosphates of the general formula FeOOP(OR)23?X, or FeOOP(OR)23, in which each R is independently a branched chain alkyl group and X is an anion selected from F- PF6-, BF4-, Ph4B-, NO3-, C14H29SO4-. These compounds react with chelates to give intense and dark colored results and find utility in thermographic materials.
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 January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
- 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.