Patent US3352318A successfully refreshed from Google Patents.
US3352318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1966-12-22
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Granted: 1967-11-14
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Expires: 1986-12-22
Abstract
No abstract record available.
Inventors
- 👤 Yanowitz Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:32
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F16K15/034; F23; F23L; F23L13/00; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/745; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7754; Y10T137/7837; Y10T137/7898; Y10T137/7903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A LOW PRESSURE DROP DECK CHECK VALVE FOR A GAS DUCT COMPRISING A DUCT CLOSURE MEMBER, PIVOT MEANS SUPPORTING SAID CLOSURE MEMBER WITHIN SAID DUCT, SAID MEMBER BEING STATICALLY UNBALANCED UPON SAID PIVOT MEANS SO AS TO BE IN A NORMALLY CLOSED POSITION WHEN NO GAS IS FLOWING IN SAID DUCT, AND AIRFOIL MEANS MOUNTED UPON SAID CLOSURE MEMBER RESPONSIVE TO FLOW OF GAS IN SAID DUCT FOR PROVIDING A FORCE IN OPPOSITION TO THE STATIC UNBALANCE OF SAID CLOSURE MEMBER TO THEREBY PLACE SAID CLOSURE MEMBER IN SUBSTANTIALLY DYNAMIC BALANCE WHEN GAS IS FLOWING IN SAID DUCT, AND STOP MEANS COOPERATIVE WITH SAID PIVOT MEANS FOR LIMITING THE DEGREE OF OPENING OF SAID CLOSURE MEMBER.
Claim 2
Dependent Claim
116 words
A LOW PRESSURE DROP DECK CHECK VALVE FOR A GAS DUCT COMPRISING A DUCT CLOSURE MEMBER, PIVOT MEANS SUPPORTING SAID CLOSURE MEMBER WITHIN SAID DUCT, SAID MEMBER BEING STATICALLY UNBALANCED UPON SAID PIVOT MEANS SO AS TO BE IN A NORMALLY CLOSED POSITION WHEN NO GAS IS FLOWING IN SAID DUCT, AND AIRFOIL MEANS MOUNTED UPON SAID CLOSURE MEMBER RESPONSIVE TO FLOW OF GAS IN SAID DUCT FOR PROVIDING A FORCE IN OPPOSITION TO THE STATIC UNBALANCE OF SAID CLOSURE MEMBER TO THEREBY PLACE SAID CLOSURE MEMBER IN SUBSTANTIALLY DYNAMIC BALANCE WHEN GAS IS FLOWING IN SAID DUCT, AND STOP MEANS COOPERATIVE WITH SAID PIVOT MEANS FOR LIMITING THE DEGREE OF OPENING OF SAID CLOSURE MEMBER.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |