Expired Canadian patentCanada
Device for vibrational cleaning of tubular heating surfaces in heat exchange plants from external contaminations mainly slag and ash
CA 789927 A · Owner: Vsesojuzny Teplotekhnichesky Nauchno-Issledovatelsky Institut Im.F.E. Dzerzhinskogo · Inventors: Leonid Izrailevich Kropp; Emmanuil Moiseevich Livshits; Alexandr Isakovich Lakhmanlos
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 16, 1968. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 1985.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJuly 16, 1968
Term endedJuly 16, 1985
Patent numberCA 789927 A
Classification (IPC)F28G
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.