US3204809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free ring floating roof seal
Assignee: LACY Manufacturing CO
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Filing: 1962-10-05
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Granted: 1965-09-07
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Expires: 1982-10-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Cadwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN A TANK HAVING A GENERALLY CYLINDRICAL VERTICAL WALL AND HAVINGA FLOATING ROOF, A SEAL EXTENDING IN AN ANNULAR SPACE BETWEEN THE WALL AND ROOF AND FORMING A SEAL THEREBETWEEN, SAID SEAL COMPRISING: (A) MEANS EXTENDING FROM SAID ROOF SUPPORTING A RING SURROUNDING AND BEING SPACED FROM SAID ROOF IN SAID ANNULAR SPACEL SAID ROOF BEING MOVABLE HORIZONTALLY INDEPENDENTLY OF SAID RING, SAID RING BEING FREE OF THE AFFECTS OF THE HORIZNTAL MOVEMENT OF SAID ROOF, (B) SAID RING HAVING AN OUTWARDLY OPENING CHANNELSHAPED CROSS SECTION;
Claim 2
Dependent Claim
86 words
IN A TANK HAVING A GENERALLY CYLINDRICAL VERTICAL WALL AND HAVINGA FLOATING ROOF, A SEAL EXTENDING IN AN ANNULAR SPACE BETWEEN THE WALL AND ROOF AND FORMING A SEAL THEREBETWEEN, SAID SEAL COMPRISING: (A) MEANS EXTENDING FROM SAID ROOF SUPPORTING A RING SURROUNDING AND BEING SPACED FROM SAID ROOF IN SAID ANNULAR SPACEL SAID ROOF BEING MOVABLE HORIZONTALLY INDEPENDENTLY OF SAID RING, SAID RING BEING FREE OF THE AFFECTS OF THE HORIZNTAL MOVEMENT OF SAID ROOF, (B) SAID RING HAVING AN OUTWARDLY OPENING CHANNELSHAPED CROSS SECTION;
References Cited (Backward Citations)
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |