Floating roof seal
CA 1099071 A · Owner: Pittsburgh-Des Moines Steel Company · Inventors: Hills, Richard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seal (30) for use in a floating roof storage tank (12) is disclosed. The seal (30) closes the annular space (16) defined between the floating roof (10) and the wall (14) of the storage tank (12). The seal (30) includes a single, unitary length of pliable material which is folded about the longitudinal axis thereof to superpose the side edges thereof. The end edges are closed and the superposed side edges are attached to the floating roof. A scuff band (74) is attached to the floating roof (10) to be interposed between the envelope (30) and the tank wall (14), and fluent material (47) can be placed into the envelope (30) when the seal is in situ. A method of forming the seal is disclosed …
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 April 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 1998.
- 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.