US2761973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase shift oscillator
Assignee: Northrop Grumman Corp
•
Filing: 1950-10-02
•
Granted: 1956-09-04
•
Expires: 1970-10-02
Abstract
No abstract record available.
Inventors
- 👤 Waldo G Hodson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:59
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/20; H03B5/26; H03B5/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2121447A
Cited
US2272589A
Cited
US2346396A
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US2401214A
Cited
US2451858A
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US2449072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |