End-reinforced bookbinding strip for impact resistance
CA 2065006 C · Owner: Groswith, Charles T. Iii · Inventors: Groswith, Charles T. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A binding system, employing a first plastic elongated strip (42) with spaced integral studs and a second plastic elongated strip (41) having similarly spaced apertures (44) and recesses (48) is provided which resists impact forces caused by dropping a bound book. A first fixed spacing (X) of studs (43b-43j) is provided along a mid-span portion of the first strip and a second fixed smaller spacing (Y) of studs (43a, 45a 43b, 43j, 45b, and 43k) is provided at both end portions (49 50) of the first strip which, reinforces the end portions against stud breakage or extrusion caused by impact forces. In the preferred embodiment the three, end studs at each end of the first strip (42) are spaced …
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 August 10, 1990 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 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.