Canadian application, no grantCanada
Process for tablet production
CA 2203284 A1 · Owner: Betzdearborn Inc. · Inventors: Mitchell, Wayne A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The use of complex phosphates in phosphate containing water treatment chemical tablets results in tablets having superior hardness and integrity for a given tableting pressure.
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 April 21, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 21, 1997
GrantedNo grant recorded
Term endedApril 21, 2017
Patent numberCA 2203284 A1
Classification (IPC)C02F5/00 +2 more
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.