US3277405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strain filter utilizing semiconductor device in mechanical oscillation
Assignee: Raytheon Co
•
Filing: 1963-09-30
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Granted: 1966-10-04
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Sten I Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:45
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A STRAIN TRANSDUCER DRIVE COMPRISING A BODY OF SEMICONDUCTOR MATERIAL HAVING A P-TYPE REGION AND AN N-TYPE REGION WITH A P-N JUNCTION THEREBETWEEN DISPOSED AT A DEPTH OF LESS THAN ABOUT .010 INCH FROM AN EXPOSED SURFACE OF SAID BODY SUBSTANTIALLY PARALLEL TO SAID JUNCTION, MEANS FOR PHYSICALLY RESTRICTING MOTION OF A PORTION OF SAID BODY, ELECTROMAGNETIC MEANS FOR MOVING AN UNRESTRICTED PORTION OF SAID BODY IN ACCORDANCE WITH AN INPUT SIGNAL TO BE FILTERED, SAID BODY OF SEMICONDUCTOR MATERIAL HAVING DIMENSIONS WHICH PROVIDE A SHARP SELFRESONANCE AT A PARTICULAR FREQUENCY CONTAINED WITHIN SAID INPUT SIGNAL, AND MEANS FOR PRODUCING A STRAIN IN SAID JUNCTION SUBSTANTIALLY AT SAID FREQUENCY OF SELF-RESONANCE OF SAID BODY.
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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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |