US3107277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical devices
Assignee: RCA Corp
•
Filing: 1960-07-05
•
Granted: 1963-10-15
•
Expires: 1980-07-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward S Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:21
CPC Classifications
H; H04; H04R; H04R23/00; H04R23/006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
56 words
A MICROPHONE SYSTEM WHICH COMPRISES A TUNNEL DIODE HAVING A RECTIFYING JUNCTION AND PRESENTING AN ELECTRICAL CHARACTERISTIC WHICH VARIES IN ACCORDANCE WITH STRESSES APPLIED TO SAID JUNCTION, A DIAPHRAGM MECHANICALLY COUPLED TO SAID DIODE TO VARY THE STRESSES EXERTED UPON SAID JUNCTION IN RESPONSE TO SOUND PRESSURE, AN OSCILLATION GENERATOR INCLUDING SAID TUNNEL DIODE WHICH COM-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |