US3504780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line shift device of electrically operated tele-communication typewriters
Assignee: Siemens AG
•
Filing: 1968-02-23
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Granted: 1970-04-07
•
Expires: 1988-02-23
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Rekewitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:10
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/18; H04L13/186; B; B41; B41J; B41J19/00; B41J19/76; B41J19/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2505729A
Cited
US2667256A
Cited
US2701045A
Cited
US2708217A
Cited
US2763357A
Cited
US2701823A
Cited
US2843667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |