Canadian application, no grantCanada
Process for manufacturing high-yield, high-strength pulp at low energy
CA 2254155 A1 · Owner: Heitner, Cyril · Inventors: Mcdonald, J. David; Stationwala, Mustafa I.; Browne, Thomas C.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A low energy process for the manufacture of high yield pulp that involves the processing of chemically-treated chips or wood fibre at high stresses or intensity.
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 November 17, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 17, 1998
GrantedNo grant recorded
Term endedNovember 17, 2018
Patent numberCA 2254155 A1
Classification (IPC)D21C3/00
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.