US3523250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division multiplex multiple frequency diversity troposcatter communication system
Assignee: Lockheed Martin Corp
•
Filing: 1967-02-21
•
Granted: 1970-08-04
•
Expires: 1987-02-21
Abstract
No abstract record available.
Inventors
- 👤 Richard A Branham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:45
CPC Classifications
H; H04; H04J; H04J4/00; H04B; H04B7/00; H04B7/02; H04B7/12; H04B7/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2895128A
Cited
US3037190A
Cited
US3150374A
Cited
US3239761A
Cited
US3292178A
Cited
US3370128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |