Method of fusing filament to a sponge
CA 2175104 C · Owner: Lewis, John C. Jr. · Inventors: Lewis, John C. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The improved method of fusing synthetic monofilament tufts to synthetic sponge material is disclosed whereby the filament tufts are set into a container-like molded base component which allows for greater support within the flexible cellular structure of conventional cellulose and polyurethane spongeware compositions thus resulting in greater resistance to tuft removal.
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 April 26, 1996 and granted February 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2018.
- 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.