Patent US2854223A successfully refreshed from Google Patents.
US2854223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating roof tanks
Assignee: Phillips Petroleum Co
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Filing: 1956-04-25
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Granted: 1958-09-30
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Expires: 1976-04-25
Abstract
No abstract record available.
Inventors
- 👤 Henry S Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:16
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A BLENDING AND STORAGE TANK FOR LIQUIDS COMPRISING: A SUBSTANTIALLY CYLINDRICAL VERTICAL OUTER WELL; MIXING MEANS EXTENDING THROUGH SAID SHELL INTO THE LOWER PORTION OF SAID TANK; AND A FLOATING ROOF WITHIN SAID SHELL, SAID ROOF COMPRISING A SUBSTANTIALLY CIRCULAR-LIKE PLATE HAVING A VERTICAL WALL AT ITS OUTER PERIPHERY AND HAVING AT LEAST ONE RECESS IN THE OUTER PERIPHERAL PORTION THEREOF, SAID RECESS IN SAID ROOF BEING ADAPTED TO RECEIVE AND SURROUND
Claim 2
Dependent Claim
72 words
A BLENDING AND STORAGE TANK FOR LIQUIDS COMPRISING: A SUBSTANTIALLY CYLINDRICAL VERTICAL OUTER WELL; MIXING MEANS EXTENDING THROUGH SAID SHELL INTO THE LOWER PORTION OF SAID TANK; AND A FLOATING ROOF WITHIN SAID SHELL, SAID ROOF COMPRISING A SUBSTANTIALLY CIRCULAR-LIKE PLATE HAVING A VERTICAL WALL AT ITS OUTER PERIPHERY AND HAVING AT LEAST ONE RECESS IN THE OUTER PERIPHERAL PORTION THEREOF, SAID RECESS IN SAID ROOF BEING ADAPTED TO RECEIVE AND SURROUND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |