US2509421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure measuring device
Assignee: RTX Corp
•
Filing: 1946-05-15
•
Granted: 1950-05-30
•
Expires: 1966-05-15
Abstract
No abstract record available.
Inventors
- 👤 Richard H Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:22
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0051; G01L9/006; G01L9/0001; G01L9/0002; G01M; G01M9/00; G01M9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2420148A
Cited
US2398372A
Cited
US2398401A
Cited
US2405199A
Cited
US2488347A
Cited
US2472045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |