US2531727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency voltage regulator
Assignee: Bendix Aviation Corp
•
Filing: 1947-10-30
•
Granted: 1950-11-28
•
Expires: 1967-10-30
Abstract
No abstract record available.
Inventors
- 👤 John F Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:31
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1333662A
Cited
US1899193A
Cited
US1981040A
Cited
US2001557A
Cited
US2284649A
Cited
US2420312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |