US2816754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic coupling device
Assignee: Individual
•
Filing: 1954-03-03
•
Granted: 1957-12-17
•
Expires: 1974-03-03
Abstract
No abstract record available.
Inventors
- 👤 Kaufman Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:27
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1373922A
Cited
US1723322A
Cited
US2129331A
Cited
US2341545A
Cited
US2432982A
Cited
US2434601A
Cited
US2485657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |