Patent US3033928A successfully refreshed from Google Patents.
US3033928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph synchronizers
Assignee: AT&T Teletype Corp
•
Filing: 1959-12-18
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Granted: 1962-05-08
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Expires: 1979-12-18
Abstract
No abstract record available.
Inventors
- 👤 Frank D Biggam
- 👤 Robert J Reek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:09
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/02; H04L7/033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2575268A
Cited
US2595656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |