US3466397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Character at a time data multiplexing system
Assignee: AT&T Inc
•
Filing: 1965-12-14
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Granted: 1969-09-09
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Expires: 1985-12-14
Abstract
No abstract record available.
Inventors
- 👤 Paul Benowitz
- 👤 Michael Ignatowitz
- 👤 David M Tutelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:12
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/22; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/07; H04J3/073; H04J3/16; H04J3/1605; H04J3/1623; H04J3/1647
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3065303A
Cited
US2840705A
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US2919435A
Cited
US3377585A
Cited
US3197563A
Cited
US3310626A
Cited
US3334181A
Cited
US3366737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |