US2179712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control
Assignee: AT&T Teletype Corp
•
Filing: 1937-12-16
•
Granted: 1939-11-14
•
Expires: 1957-12-16
Abstract
No abstract record available.
Inventors
- 👤 Charles W Burcky
- 👤 Raymond E Zenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:04
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/02; H04L12/12; Y; Y02; Y02D; Y02D30/00; Y02D30/50
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) | 1942-11-13 | 1943-05-15 | 1943-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-13 | 1947-05-15 | 1947-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-13 | 1951-05-15 | 1951-11-14 | $7700.00 | Window Closed / Lapsed |