Coke oven door jamb cleaning tool
CA 1081648 A · Owner: Koppers Company, Inc. · Inventors: Irwin, Rodney C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cleaning tool for door jamb surfaces of a coke oven chamber includes: a sleeve fixed to a frame that is movable toward the door jamb; a plunger resilienty mounted in the sleeve; a support fixed to the plunger; and a multi-sided scraper tool rotatably mounted to the support Two such, cleaning tools may be used to clean the inside and the outside door jamb surfaces.
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
- Granted July 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 1997.
- 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.