Patent US2950421A successfully refreshed from Google Patents.
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
2026-11-09 05:33
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1736797A
Cited
US1754436A
Cited
US1684530A
Cited
US2092955A
Cited
US2381835A
Cited
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 |