Perforated honeycomb
CA 2119641 C · Owner: Wilson, Susan L. · Inventors: Wilson, Susan L.; Landi, Curtis L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A panel (10) of perforated thermoplastic material having sound and shock dampening characteristics comprised of a perforated honeycomb core (16) and either whole or perforated facing sheets (18 20), thermal compression bonded to the core. The core can be faced on one side only, or on both sides to create a pad or panel of such material. Furthermore, the outer facing can be sealed together to form a hermetically sealed chamber the shock-absorbing characteristics of which can be selectively controlled.
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 3, 1992 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 3, 2014.
- 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.