Process of making a water dispersible titanium dioxide pigment useful in paper laminates
CA 2511095 A1 · Owner: Bolt, John Davis · Inventors: Thiele, Erik Shepard; Bolt, John Davis; Mehr, Scott Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for making a titanium dioxide pigment having consisting of titanium dioxide and single layer of inorganic surface treatment consisting of aluminum phosphate wherein the pigment is characterized by and isoelectric point which is greater than pH 6 and a negative zeta potential of at a pH of 7.5 or more.
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 December 26, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 26, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 2025.
- 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.