Patent US3373425A successfully refreshed from Google Patents.
US3373425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel diode circuit utilized to control the reply of a passive transponder
Assignee: Individual
•
Filing: 1967-04-14
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Granted: 1968-03-12
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Expires: 1987-04-14
Abstract
No abstract record available.
Inventors
- 👤 Erwin E Barischoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:00
CPC Classifications
H; H03; H03B; H03B7/00; H03B7/02; H03B7/06; H03B7/08; G; G01; G01S; G01S13/00; G01S13/74; G01S13/75; G01S13/751; G01S13/758
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3299424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |