Method for pulverization of vegetable fiber materials and its pressure roller system
CA 2093618 A1 · Owner: Prater, Robert Wesley · Inventors: Prater, Robert Wesley; Ohashi, Jun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The manufacture of fine powder from vegetable fiber materials at relatively low cost and without contamination, wherein the manufacturing system involved is equipped with a pressure roller system having a couple of pressure rollers having teeth of wave-shaped crosssection and teeth bottoms, the teeth of one roller being engaged with the teeth bottom of the other and the both rollers being placed opposite to each other with a minimal space in between and arranged for synchronous revolution with the present invention comprising such processes as to pressure-feed vegetable fiber raw materials to said pressure roller system to, mill aforesaid raw material with the …
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 7, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 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.