Fabric roll
CA 2069409 C · Owner: Keip, Charles P. · Inventors: Keip, Charles P.; Cobane, Joseph L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roll for fabric or like material includes a core (12) on which the material is adapted to be wound, and an end cap (14) removably secured to each end of the core. The core has a replaceable flexible flap (66) which extends approximately 90° around the core permitting the leading edge of the fabric or like material to be inserted under the flap so that subsequent turns of the wound material will not show a permanent mark or crease when the second and subsequent turns wrap over the leading edge. The end caps have an undulating pattern (16 18) along their perimeters which , interfit with other end caps when two or more rolls are formed into a module. Modules (M) are combined with top and …
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 October 1, 1991 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 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.