US2520923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force measuring device
Assignee: Individual
•
Filing: 1945-06-30
•
Granted: 1950-09-05
•
Expires: 1965-06-30
Abstract
No abstract record available.
Inventors
- 👤 Robert T Franzel
- 👤 John W Farrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:35
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/225; G01L1/2262; G01L1/2206; G01L1/2231; G01L1/2237; G01L5/00; G01L5/13; G01L5/136
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1912213A
Cited
US2104688A
Cited
US2275532A
Cited
US2322319A
Cited
US2360886A
Cited
US2426390A
Cited
US2414161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |