Patent US4020014A successfully refreshed from Google Patents.
Patent US2677776A successfully refreshed from Google Patents.
US2677776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous motor of the selfstarting type
Assignee: E INGRAHAM Co
•
Filing: 1952-05-28
•
Granted: 1954-05-04
•
Expires: 1972-05-28
Abstract
No abstract record available.
Inventors
- 👤 Kohlhagen Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:17
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K21/00; H02K21/12; H02K21/125; H02K2201/00; H02K2201/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |