Patent US3228702A successfully refreshed from Google Patents.
US3228702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable seal for floating roof
Assignee: Union Tank Car Co
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Filing: 1961-11-02
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Granted: 1966-01-11
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Expires: 1981-11-02
Abstract
No abstract record available.
Inventors
- 👤 Reign C Ulm
- 👤 Robert W Bodley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:10
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42; B65D88/48; Y; Y10; Y10S; Y10S277/00; Y10S277/927; Y10T; Y10T137/00; Y10T137/4456; Y10T137/4643
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A SYSTEM FOR REGULATING FLUID PRESSURE IN AN INFLATABLE SEAL COMPRISING VARIABLE VOLUME MEANS, FIRST FLUID COMMUNICATION MEANS BETWEEN SAID VARIABLE VOLUME MEANS AND SAID SEAL, SAID FIRST FLUID COMMUNICATION MEANS INCLUDING FIRST VALVE MEANS RESPONSIVE TO PREDETERMINED PRESSURE DIFFERENTIALS BETWEEN THE FLUID IN SAID SEAL AND THE FLUID IN SAID VARIABLE VOLUME MEANS FOR CONTROLLING THE FLOW OF FLUID BETWEEN SAID VARIABLE VOLUME MEANS AND SAID SEAL MEANS, SECOND FLUID COMMUNICATION MEANS BETWEEN SAID VARIABLE VOLUME MEANS AND THE ATMOSPHERE, SAID SECOND FLUID COMMUNICATION MEANS INCLUDING SECOND VALVE MEANS FOR CONTROLLING THE FLOW OF FLUID BETWEEN SAID VARIABLE VOLUME MEANS AND THE ATMOSPHERE, SAID VARIABLE VOL-
Claim 2
Independent Claim
107 words
A SYSTEM FOR REGULATING FLUID PRESSURE IN AN INFLATABLE SEAL COMPRISING VARIABLE VOLUME MEANS, FIRST FLUID COMMUNICATION MEANS BETWEEN SAID VARIABLE VOLUME MEANS AND SAID SEAL, SAID FIRST FLUID COMMUNICATION MEANS INCLUDING FIRST VALVE MEANS RESPONSIVE TO PREDETERMINED PRESSURE DIFFERENTIALS BETWEEN THE FLUID IN SAID SEAL AND THE FLUID IN SAID VARIABLE VOLUME MEANS FOR CONTROLLING THE FLOW OF FLUID BETWEEN SAID VARIABLE VOLUME MEANS AND SAID SEAL MEANS, SECOND FLUID COMMUNICATION MEANS BETWEEN SAID VARIABLE VOLUME MEANS AND THE ATMOSPHERE, SAID SECOND FLUID COMMUNICATION MEANS INCLUDING SECOND VALVE MEANS FOR CONTROLLING THE FLOW OF FLUID BETWEEN SAID VARIABLE VOLUME MEANS AND THE ATMOSPHERE, SAID VARIABLE VOL-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |