US2697807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control system for maintaining tension
Assignee: Cutler Hammer Inc
•
Filing: 1949-09-15
•
Granted: 1954-12-21
•
Expires: 1969-09-15
Abstract
No abstract record available.
Inventors
- 👤 Pell Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:06
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/48; B21B37/52; B21B37/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20353E
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US2154287A
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US2444248A
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US2508166A
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US2601527A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |