US2491969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric signal transmission system
Assignee: FR SADIR CARPENTIER SOC
•
Filing: 1946-10-14
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Granted: 1949-12-20
•
Expires: 1966-10-14
Abstract
No abstract record available.
Inventors
- 👤 Gloess Paul Francois Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:07
CPC Classifications
H; H03; H03K; H03K7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB510881A
Cited
US2224580A
Cited
US2314707A
Cited
US2358152A
Cited
US2418568A
Cited
US2420374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |