US2535442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterodyne eliminator communication system
Assignee: Individual
•
Filing: 1949-07-26
•
Granted: 1950-12-26
•
Expires: 1969-07-26
Abstract
No abstract record available.
Inventors
- 👤 James L A Mclaughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:31
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/1027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1816953A
Cited
US2179106A
Cited
US2407260A
Cited
US2364863A
Cited
US2411206A
Cited
US2393224A
Cited
US2480870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |