US2950421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensing device
Assignee: Individual
•
Filing: 1956-10-09
•
Granted: 1960-08-23
•
Expires: 1976-10-09
Abstract
No abstract record available.
Inventors
- 👤 Langstroth Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:02
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/08; G01L19/12; G01L9/00; G01L9/0041; G01L9/0072; G01L9/0082; G01L9/0086; H; H01; H01H; H01H35/00; H01H35/24; H01H35/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1736797A
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US1754436A
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US1684530A
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US2092955A
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US2381835A
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US2442108A
Cited
US2607228A
Cited
US2510460A
Cited
US2677963A
Cited
US2740927A
Cited
US2785570A
Cited
US2714703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |