Patent US3461235A successfully refreshed from Google Patents.
US3461235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transmission system and printer
Assignee: International Business Machines Corp
•
Filing: 1965-08-17
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Granted: 1969-08-12
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Expires: 1985-08-17
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Willcox
- 👤 Newland F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:17
CPC Classifications
H; H04; H04L; H04L17/00; H04L17/16; H04L17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |