US1403767A
Expired / Lapsed
US
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Electromagnetic step-by-step mechanism
Assignee: AT&T Inc
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Filing: 1919-12-20
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Granted: 1922-01-17
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Expires: 1939-12-20
Abstract
No abstract record available.
Inventors
- 👤 Harold W Goff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:28
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/06; H02K7/065; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1529; Y10T74/1558; Y10T74/1565; Y10T74/1566; Y10T74/1568; Y10T74/1569; Y10T74/1571
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) | 1925-01-16 | 1925-07-18 | 1926-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-01-16 | 1929-07-18 | 1930-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-01-16 | 1933-07-18 | 1934-01-17 | $7700.00 | Window Closed / Lapsed |