US3562665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave oscillator including two bulk negative resistance devices in a three-terminal cavity
Assignee: RCA Corp
•
Filing: 1969-05-20
•
Granted: 1971-02-09
•
Expires: 1989-05-20
Abstract
Abstract BY EMPLOYING A MICROWAVE RESONANT CAVITY STRUCTURE COMPOSED OF TWO MIRROR-IMAGE PORTIONS WITH RESPECT TO A PLANE OF SYMMETRY AND CONDUCTIVE MEANS SITUATED IN THE PLANE OF SYMMETRY, WHERE THE CONDUCTIVE MEANS HAS AT LEAST ONE APERTURE THEREIN FOR COUPLING RF ENERGY BETWEEN THE TWO PORTIONS, DISSIMILAR BULK SEMICONDUCTOR NEGATIVE DIFFERENTIAL RESISTANCE DEVICES MAY BE CONNECTED IN SERIES WITH EACH OTHER WITHOUT AFFECTING THE BEHAVIOR OF THE CAVITY AT THE RF FREQUENCY.
Inventors
- 👤 Robert Dean Larrabee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:35
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/143
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |