US2879802A
Expired / Lapsed
US
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Differential pressure-responsive device
Assignee: Manning Maxwell and Moore Inc
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Filing: 1956-04-09
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Granted: 1959-03-31
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Expires: 1976-04-09
Abstract
No abstract record available.
Inventors
- 👤 Bois Robert C Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:39
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/06; G01L19/0618; F; F16; F16J; F16J3/00; F16J3/02; G01L11/00; G01L11/004; G01L11/006; G01L19/04; G01L7/00; G01L7/02; G01L7/08; G01L7/082; G01L9/00; G01L9/0041; G01L9/0042; G01L9/0044; G01L9/0082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA510079A
Cited
US2150771A
Cited
US2407076A
Cited
US2705021A
Cited
US2751530A
Cited
US2761471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |