US2527523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency control system
Assignee: Farnsworth Research Corp
•
Filing: 1944-08-11
•
Granted: 1950-10-31
•
Expires: 1964-08-11
Abstract
No abstract record available.
Inventors
- 👤 Borst John Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:54
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2121103A
Cited
US2100733A
Cited
US2205762A
Cited
US2272401A
Cited
US2362000A
Cited
US2363650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |