Patent US1631982A successfully refreshed from Google Patents.
US1631982A
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Control mechanism
Assignee: AT&T Inc
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Filing: 1922-10-09
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Granted: 1927-06-14
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Expires: 1942-10-09
Abstract
No abstract record available.
Inventors
- 👤 Louis M Potts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/0095; G; G04; G04C; G04C11/00; G04C11/08; G04C11/081; G04C11/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1930-06-13 | 1930-12-13 | 1931-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-06-13 | 1934-12-13 | 1935-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-06-13 | 1938-12-13 | 1939-06-14 | $7700.00 | Window Closed / Lapsed |