Full secondary seal, wiper type, for a floating roof tank
CA 1066471 A · Owner: Chicago Bridge And Iron Company · Inventors: Mccabe, John S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a vertical cylindrical liquid storage tank having a circular floating roof, an improved sealing means including an elastomeric composite strip impermeable to vapor connected at its inner edge by an essentially vapor tight joint to the roof edge and extending as an annulus outwardly to the tank inner side wall, the elastomeric composite strip comprising a plurality of flexible resilient elongated stiffeners laterally positioned and embedded in elastomeric material, and the elongated stiffeners extending from the strip edge joined to the roof and terminating short of the strip edge at the tank wall. An elastomeric composite strip impermeable to, petroleum vapor, having a plurality of …
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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 November 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 20, 1996.
- 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.