US3305685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor laser and method
Assignee: University of California Berkeley
•
Filing: 1963-11-07
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Granted: 1967-02-21
•
Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 Wang Shyh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:44
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/30; H01S5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF CAUSING EMISSION OF PHOTONS IN A REGION OF SEMICONDUCTOR MATERIAL OF THE TYPE IN WHICH THE BOTTOM OF THE CONDUCTION BAND DOES NOT OCCUR AS THE SAME MOMENTUM AT THE TOP OF THE VALENCE BAND WHICH COMPRISES INTRODUCING MAJORITY CARRIERS WITH A MOMENTUM CORRESPONDING TO THAT OF THE TOP OF THE VALENCE BAND INTO THE CONDUCTION BAND OF SAID REGION, AND SIMULTANEOUSLY INTRODUCING MINORITY CARRIERS INTO THE VALENCE BAND OF SAID REGION WHEREBY SAID MAJORITY AND MINORITY CARRIERS CAN UNDERGO BAND-TO-BAND RADIATIVE RECOMBINATION.
Claim 2
Independent Claim
86 words
THE METHOD OF CAUSING EMISSION OF PHOTONS IN A REGION OF SEMICONDUCTOR MATERIAL OF THE TYPE IN WHICH THE BOTTOM OF THE CONDUCTION BAND DOES NOT OCCUR AS THE SAME MOMENTUM AT THE TOP OF THE VALENCE BAND WHICH COMPRISES INTRODUCING MAJORITY CARRIERS WITH A MOMENTUM CORRESPONDING TO THAT OF THE TOP OF THE VALENCE BAND INTO THE CONDUCTION BAND OF SAID REGION, AND SIMULTANEOUSLY INTRODUCING MINORITY CARRIERS INTO THE VALENCE BAND OF SAID REGION WHEREBY SAID MAJORITY AND MINORITY CARRIERS CAN UNDERGO BAND-TO-BAND RADIATIVE RECOMBINATION.
References Cited (Backward Citations)
US3121203A
Cited
US3060327A
Cited
US3053998A
Cited
US3105177A
Cited
US3059117A
Cited
US3245002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |