US2445618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulation system
Assignee: Westinghouse Electric Corp
•
Filing: 1943-04-01
•
Granted: 1948-07-20
•
Expires: 1963-04-01
Abstract
No abstract record available.
Inventors
- 👤 John A Hutcheson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:18
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2069538A
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US2113214A
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US2266401A
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US2203750A
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US2293387A
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US2252293A
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US2280026A
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US2316123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-20 | 1952-01-19 | 1952-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-20 | 1956-01-19 | 1956-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-20 | 1960-01-19 | 1960-07-20 | $7700.00 | Window Closed / Lapsed |