Abandonment plug for concrete floors
CA 2014424 C · Owner: Sosinski, Charles W. · Inventors: Sosinski, Charles W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An abandonment plug assembly for limiting heat and fire passage through an opening formed through a floor comprises a, cover for disposition atop the floor and configured to extend beyond the opening and engage the floor first and second cup, members dependant from the cover and mutually displaceable toward one another to force a substance disposed therebetween into contiguity with the sidewall bounding the opening an, actuator for effecting the displacement of the first and second cup members and intumescent discs depending from the second cup member.
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 11, 1990 and granted August 23, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 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.