US2672501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control device for telegraphy
Assignee: AT&T Teletype Corp
•
Filing: 1950-12-05
•
Granted: 1954-03-16
•
Expires: 1970-12-05
Abstract
No abstract record available.
Inventors
- 👤 Carl W Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:18
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)
US2290626A
Cited
US924616A
Cited
US1688711A
Cited
US2102070A
Cited
US2386009A
Cited
US2531528A
Cited
US2522461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |