Closed end paint roller and method of manufacture thereof
CA 2116715 C · Owner: Shehow, Kenneth L. · Inventors: Burns, Fredrick B.; Polzin, Bruce C.; Shehow, Kenneth L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A closed-end roller cover in which the pile fabric on the end and the portion of the core to which it is secured is integral, with the main body of the cover and a method of manufacture, thereof. The cover is formed by heating the end portion of a fabric covered blank a short distance at the end preferably along, parallel lines so as to form structural lines of weakness and, immediately thereafter crimping the still pliable end portion inwardly upon itself to form a solid end wall with adhering 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 March 1, 1994 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 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.