Retrofit coke oven door seal
CA 2009916 C · Owner: Saturn Machine & Welding Co. Inc. · Inventors: Baird, Billy C.; Baird, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A retrofit coke oven door seal to replace existing coke oven door seals that have become ineffective due to normal use. The retrofit coke oven door seal includes a leaf spring and seal arrangement and a unique mounting structure to enable the existing seal on a coke oven door to be easily removed and replaced by the present invention without modification or alteration to the door body or the existing refractories thus making improvements (in emission control) on existing doors by using a relatively simple structure which is cost effective. The retrofit seal for coke oven doors includes a mounting structure attached to the periphery of the diaphragm plate normally provided on a coke oven …
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 February 13, 1990 and granted April 16, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 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.