US3231831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mode control in negative resistance devices
Assignee: AT&T Inc
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Filing: 1962-03-21
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Granted: 1966-01-25
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Expires: 1982-03-21
Abstract
No abstract record available.
Inventors
- 👤 Marion E Hines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:21
CPC Classifications
H; H03; H03B; H03B7/00; H03B7/12; H03B7/14; H03B7/146; H01; H01P; H01P7/00; H01P7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
APPARATUS WHICH COMPRISES A FIRST NEGATIVE RESISTANCE DIOED, A SECOND NEGATIVE RESISTANCE DIOED CONNECTED IN SHUNT WITH THE FIRST, ACTIVATING MEANS CONNECTED IN SHUNT WITH SAID DIODE FOR CAUSING THEM TO BE OPERABLE AT A PLURALITY OF FREQUENCIES, FIRST RESISTIVE MEANS CONNECTED IN SHUNT WITH SAID DIODES FOR LOADING THEM AT ONE FREQUENCY OF SAID PLURALITY,
Claim 2
Dependent Claim
56 words
APPARATUS WHICH COMPRISES A FIRST NEGATIVE RESISTANCE DIOED, A SECOND NEGATIVE RESISTANCE DIOED CONNECTED IN SHUNT WITH THE FIRST, ACTIVATING MEANS CONNECTED IN SHUNT WITH SAID DIODE FOR CAUSING THEM TO BE OPERABLE AT A PLURALITY OF FREQUENCIES, FIRST RESISTIVE MEANS CONNECTED IN SHUNT WITH SAID DIODES FOR LOADING THEM AT ONE FREQUENCY OF SAID PLURALITY,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |