Coke oven door liner assembly
CA 2201543 C · Owner: Suey, Paul V. · Inventors: Suey, Paul V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coke oven door assembly for sealing an opening in a coke oven has a plurality of first abutting vertically aligned refractory layers which act as a cold face refractory liner and are adapted for securement to the inner surface of a coke oven door, and a plurality of second abutting vertically aligned refractory layers spaced from and secured to the cold face refractory liner which act as a hot face refractory liner, and an integral one piece uppermost refractory section. The uppermost refractory section has a bottom a horizontally, extending top portion, and first and second downwardly depending leg portions with an interconnecting web. The first downwardly depending leg portion is …
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 2, 1997 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2019.
- 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.