US2843670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for electro-mechanically recording telegraphic impulses
Assignee: Siemens and Halske AG
•
Filing: 1955-02-11
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Granted: 1958-07-15
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Expires: 1975-02-11
Abstract
No abstract record available.
Inventors
- 👤 Hell Rudolf
- 👤 Daudt Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
H; H04; H04L; H04L15/00; H04L15/24; H04L15/28; H04L15/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2361174A
Cited
US2582043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |