Phosphating process
CA 1075134 A · Owner: Imperial Chemical Industries Limited · Inventors: Brock, Michael; Cooke, Brian A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Low molecular weight water soluble polymers (molecular weight less than 5 x 105) which comprise monomer moieties selected from acrylic acid methacrylic, acid, acrylamide and methacrylamide when present in, acid metal phosphating solutions modify the physical form of sludge produced. Process efficiency is improved.
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 April 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 8, 1997.
- 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.