Patent US3649123A successfully refreshed from Google Patents.
US2680203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnetic clutch
Assignee: Individual
•
Filing: 1952-04-12
•
Granted: 1954-06-01
•
Expires: 1972-04-12
Abstract
No abstract record available.
Inventors
- 👤 Igor V Zozulin
- 👤 George J Okulitch
- 👤 George M Volkoff
- 👤 Vladimir J Okulitch
- 👤 Alec S J Ellett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:41
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/046
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1415079A
Cited
US1862267A
Cited
US1902471A
Cited
US2193214A
Cited
US2428634A
Cited
US2550861A
Cited
US2632859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |