Method and apparatus for manufacturing paint roller and product produced thereby
CA 2136359 C · Owner: Ez Paintr Corporation · Inventors: Barton, William W.; Gracia, Jaime Alvarez; Polzin, Bruce C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention consists of bonding a strip of pile fabric to a plastic tube which is, mounted over a mandrel, by an adhesive substance. The adhesive substance may take, many forms, and heat derived from a multitude of heat sources such as infra , red, radio, frequency, open flame quartz, induction, ultrasonic or a plasma jet may be used to, ensure a good bond between the plastic tube and the pile fabric.
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 November 22, 1994 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 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.