US2537767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase shifting control circuit
Assignee: General Electric Co
•
Filing: 1948-09-25
•
Granted: 1951-01-09
•
Expires: 1968-09-25
Abstract
No abstract record available.
Inventors
- 👤 Daniel F Langenwalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:44
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/02; H02M1/04; H02M1/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1900538A
Cited
US1893772A
Cited
US1926275A
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US2084900A
Cited
US2228843A
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US2246177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |