Continuous structure forming method and the resulting product
CA 2040666 C · Owner: Payne, Leroy · Inventors: Payne, Leroy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of continuously forming an extended length of a unitary structure includes the following steps. A supply of a porous flexible blanket is provided. A high viscosity flowable solidifiable mixture is continuously flowed simultaneously into an entire continuously moving width of the porous flexible blanket. Pressure is applied against the treated blanket to form a uniform matrix therewith. The rate of advance of the blanket is monitored. The rate of alliance is coordinated with the flow rate of the mixture into the blanket and with the pressure applied thereto: A substantially flat non-porous flexible envelope is positioned along the length of the treated blanket. The envelope/blanket …
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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 April 17, 1991 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2013.
- 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.