US2434936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulation system
Assignee: STC PLC
•
Filing: 1942-08-24
•
Granted: 1948-01-27
•
Expires: 1962-08-24
Abstract
No abstract record available.
Inventors
- 👤 Labin Emile
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:31
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/026; H03; H03K; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1655543A
Cited
US2061734A
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US2086918A
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US2105538A
Cited
US2113214A
Cited
US2208422A
Cited
US2227596A
Cited
US2280707A
Cited
US2266541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-26 | 1951-07-28 | 1952-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-26 | 1955-07-28 | 1956-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-26 | 1959-07-28 | 1960-01-27 | $7700.00 | Window Closed / Lapsed |