Filter fabrics
CA 2081544 A1 · Owner: Scapa Group Plc · Inventors: Bennett, Roy; Doran, Frederick; Bennett, Roy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of forming a barrel neck connection between filter cloths (22, 23) for application to an apertured press plate is proposed, the method involving the steps of creating an aperture (13) in a flange-forming fabric having thermoplastic properties, heating the fabric in a region extending about the said aperture (13) and displacing, the fabric in such region to form an outwardly extending tube (18) for telescoping engagement with a corresponding tube formed in a second flange-forming fabric arranged in opposed disposition with respect thereto. Displacement of the fabric is ordinarily effected by a plug (15) which is brought into contact with the fabric (11) and is moved into progressive …
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 October 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2014.
- 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.