Patent US1924138A successfully refreshed from Google Patents.
US1924138A
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Control mechanism
Assignee: AT&T Inc
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Filing: 1928-11-16
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Granted: 1933-08-29
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Expires: 1948-11-16
Abstract
No abstract record available.
Inventors
- 👤 Strawn Marion Llewllyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:49
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86574; Y10T137/86638; Y10T137/86646; Y10T137/86654; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6757
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) | 1936-08-28 | 1937-02-27 | 1937-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-28 | 1941-02-27 | 1941-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-28 | 1945-02-27 | 1945-08-29 | $7700.00 | Window Closed / Lapsed |