US2927321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio transmission systems with modulatable passive responder
Assignee: Individual
•
Filing: 1956-01-26
•
Granted: 1960-03-01
•
Expires: 1976-01-26
Abstract
No abstract record available.
Inventors
- 👤 Donald B Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:07
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/034; H04B1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1744036A
Cited
US1974184A
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US2212110A
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US2199179A
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US2193102A
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US2407199A
Cited
US2425314A
Cited
US2459811A
Cited
US2695926A
Cited
US2475127A
Cited
US2595141A
Cited
US2511409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |