Pulp making device
CA 2098516 C · Owner: Ali, Shaikh Farhad · Inventors: Ali, Shaikh Farhad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The details of a device, being basically common for making high quality primarily mechanical, but also semi-mechanical and chemical pulps from almost all kinds of cellulosic raw materials such as wood, waste papers and non-wood plants - and with low capital and operating costs - are disclosed. These raw materials mainly due to the sloped configuration of the platform, butt against the retaining bars to maintain a relatively constant distance from the shower headers which are located behind these bars. These headers through the, shower jets, apply oscillating fan-shaped, overlapping, hot, water sprays under pressure with or without chemicals, to, the surface of the cellulosic material being …
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 June 16, 1993 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2015.
- 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.