Process for resin impregnation of a porous web
CA 2180133 A1 · Owner: Iyer, Shridhar Ratnaswamy · Inventors: Shirrell, Charles David; Iyer, Shridhar Ratnaswamy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for minimizing resin waste in the impregnation of a porous web with a thermosettable resin. The process involves the use of resin application means comprising a rotatable roller (4) on which is deposited a liquid-form thermosettable resin; passing a fibrous substrate (2) in countercurrent contact with the thermosettable resin on the rotating roller so as to transfer the thermosettable resin to the fibrous substrate (2) removing any, untransferred resin from the rotating roller (4) and depositing the removed resin onto the fibrous substrate prior to contact thereof with the rotating roller; and passing the resin-containing fibrous web to a heating zone to partially …
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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 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2016.
- 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.