Paint roller and apparatus and method for making the same
CA 2074087 C · Owner: Sekar, Chandra · Inventors: Sekar, Chandra
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method and apparatus for making reusable paint rollers comprised of a core formed from thermoplastic material. Known methods and apparatus suffer from the drawbacks of bulky preformed thermoplastic tubular cores that are difficult to handle and expensive to transport, long assembly lines and the need for a heater. The above problems are solved by providing a method and apparatus for making reusable paint rollers comprised of a core formed from thermoplastic material. The thermoplastic material is formed into a core (18) about a stationary mandril (14). An adhesive is then applied to the core (18) thereupon a cover (30) is bonded thereto. In a first embodiment, …
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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 August 15, 1990 and granted May 26, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 2012.
- 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.