US3312906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multivalley semiconductor amplifier for hypersonic waves
Assignee: International Business Machines Corp
•
Filing: 1965-02-01
•
Granted: 1967-04-04
•
Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Pomerantz Melvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:53
CPC Classifications
H; H03; H03F; H03F13/00; H10; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A HYPERSONIC AMPLIFIER COMPRISING A MULTI-VALLEY SEMICONDUCTOR CRYSTAL HAVING OPPOSED, HIGHLY POLISHED, PARALLEL FACES, MEANS FOR DIRECTING AN ACOUSTICAL WAVE ALONG A PREDETERMINED AXIS OF SAID CRYSTAL, SAID ACOUSTICAL WAVE HAVING A POLARIZATION SUCH THAT FOR SAID AXIS THE ACOUSTICAL WAVE LIFTS THE DEGENERACY OF THE CONDUCTION BANDS OF SAID MULTI-VALLEY SEMICONDUCTOR, MEANS EXTERNAL OF SAID CRYSTAL FOR MOVING FREE ELECTRONS AT A VELOCITY GREATER THAN THE VELOCITY OF SAID ACOUSTICAL WAVE IN SAID CRYSTAL DURING THE PASSAGE OF AND IN THE DIRECTION OF SAID ACOUSTICAL WAVE THROUGH SAID CRYSTAL TO OBTAIN AMPLIFICATION OF SAID WAVE WITHIN THE CRYSTAL.
Claim 2
Dependent Claim
99 words
A HYPERSONIC AMPLIFIER COMPRISING A MULTI-VALLEY SEMICONDUCTOR CRYSTAL HAVING OPPOSED, HIGHLY POLISHED, PARALLEL FACES, MEANS FOR DIRECTING AN ACOUSTICAL WAVE ALONG A PREDETERMINED AXIS OF SAID CRYSTAL, SAID ACOUSTICAL WAVE HAVING A POLARIZATION SUCH THAT FOR SAID AXIS THE ACOUSTICAL WAVE LIFTS THE DEGENERACY OF THE CONDUCTION BANDS OF SAID MULTI-VALLEY SEMICONDUCTOR, MEANS EXTERNAL OF SAID CRYSTAL FOR MOVING FREE ELECTRONS AT A VELOCITY GREATER THAN THE VELOCITY OF SAID ACOUSTICAL WAVE IN SAID CRYSTAL DURING THE PASSAGE OF AND IN THE DIRECTION OF SAID ACOUSTICAL WAVE THROUGH SAID CRYSTAL TO OBTAIN AMPLIFICATION OF SAID WAVE WITHIN THE CRYSTAL.
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |