Patent US3075668A successfully refreshed from Google Patents.
US3075668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient foam seal for floating roof
Assignee: Chicago Bridge and Iron Co
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Filing: 1960-04-21
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Granted: 1963-01-29
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Expires: 1980-04-21
Abstract
No abstract record available.
Inventors
- 👤 Reese Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:16
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42; B65D88/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A CYLINDRICAL TANK FOR THE STORAGE OF A VOLATILE LIQUID, A FLOATING ROOF HAVING A DIAMETER LESS THAN THE INTERNAL DIAMETER OF SAID TANK AND ADAPTED TO FLOAT ON SAID LIQUID, AND A SEAL DISPOSED BETWEEN SAID FLOATING ROOF AND SAID TANK, SAID SEAL COMPRISING: A THIN, FLEXIBLE, IMPERVIOUS PROTECTIVE ENVELOPE; AND A RELATIVELY THIN SLAB, BENT INTO A C-SHAPED CONFIGURATION, WITHIN SAID ENVELOPE; SAID SLAB HAVING VERTICALLY SPACED UPPER AND LOWER EDGE PORTIONS; MEANS FOR CLAMPINGLY ENGAGING THE UPPER AND LOWER EDGE PORTIONS OF SAID C-SHAPED SLAB IN FIXED RELATION TO SAID ROOF;
Claim 2
Dependent Claim
95 words
IN A CYLINDRICAL TANK FOR THE STORAGE OF A VOLATILE LIQUID, A FLOATING ROOF HAVING A DIAMETER LESS THAN THE INTERNAL DIAMETER OF SAID TANK AND ADAPTED TO FLOAT ON SAID LIQUID, AND A SEAL DISPOSED BETWEEN SAID FLOATING ROOF AND SAID TANK, SAID SEAL COMPRISING: A THIN, FLEXIBLE, IMPERVIOUS PROTECTIVE ENVELOPE; AND A RELATIVELY THIN SLAB, BENT INTO A C-SHAPED CONFIGURATION, WITHIN SAID ENVELOPE; SAID SLAB HAVING VERTICALLY SPACED UPPER AND LOWER EDGE PORTIONS; MEANS FOR CLAMPINGLY ENGAGING THE UPPER AND LOWER EDGE PORTIONS OF SAID C-SHAPED SLAB IN FIXED RELATION TO SAID ROOF;
References Cited (Backward Citations)
US2092877A
Cited
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Cited
US2133199A
Cited
US2190476A
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US2523292A
Cited
US2914212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |