Patent US3073348A successfully refreshed from Google Patents.
US3073348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure responsive control mechanism
Assignee: Georgia Tech Research Institute
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Filing: 1957-12-19
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Granted: 1963-01-15
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Expires: 1977-12-19
Abstract
No abstract record available.
Inventors
- 👤 Robert L Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:29
CPC Classifications
F; F02; F02D; F02D1/00; F02D2700/00; F02D2700/02; F02D2700/0269; F02D2700/0282; F02D2700/0284; F02D2700/0289
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PRESSURE RESPONSIVE CONTROL DEVICE COMPRISING A CASING, A PAIR OF SEALED BELLOWS WITHIN SAID CASING, EACH DEFINING AN INTERNAL CHAMBER AND AN EXTERNAL CHAMBER BETWEEN THE SIDES OF SAID BELLOWS AND THE CASING, A FLOATING BRIDGE INTERCONNECTING SAID BELLOWS, AND AN OPERATING
Claim 2
Dependent Claim
43 words
A PRESSURE RESPONSIVE CONTROL DEVICE COMPRISING A CASING, A PAIR OF SEALED BELLOWS WITHIN SAID CASING, EACH DEFINING AN INTERNAL CHAMBER AND AN EXTERNAL CHAMBER BETWEEN THE SIDES OF SAID BELLOWS AND THE CASING, A FLOATING BRIDGE INTERCONNECTING SAID BELLOWS, AND AN OPERATING
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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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |