US3448405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning laser
Assignee: AT&T Inc
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Filing: 1966-02-17
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Granted: 1969-06-03
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Expires: 1986-02-17
Abstract
No abstract record available.
Inventors
- 👤 Peter A Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:22
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/10; H01S3/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
APPARATUS COMPRISING A BODY OF SEMICONDUCTOR MATERIAL PROVIDING THEREIN UPPER AND LOWER ENERGY LEVELS APPROPRIATE FOR THE STIMULATED EMISSION OF RADIATION, SAID BODY HAVING A PREFERRED SURFACE THROUGH WHICH SAID RADIATION IS EMITTED, AND MEANS FOR PUMPING SAID BODY INHOMOGENEOUSLY TO PRODUCE BETWEEN SAID LEVELS A POPULATION INVERSION VARYING THROUGH AT LEAST TWO MAXIMA ANDD A MINIMUM THEREBETWEEN IN A PLANE TRANSVERSE TO THE NORMAL TO SAID PREFERRED SURFACE.
Claim 2
Dependent Claim
69 words
APPARATUS COMPRISING A BODY OF SEMICONDUCTOR MATERIAL PROVIDING THEREIN UPPER AND LOWER ENERGY LEVELS APPROPRIATE FOR THE STIMULATED EMISSION OF RADIATION, SAID BODY HAVING A PREFERRED SURFACE THROUGH WHICH SAID RADIATION IS EMITTED, AND MEANS FOR PUMPING SAID BODY INHOMOGENEOUSLY TO PRODUCE BETWEEN SAID LEVELS A POPULATION INVERSION VARYING THROUGH AT LEAST TWO MAXIMA ANDD A MINIMUM THEREBETWEEN IN A PLANE TRANSVERSE TO THE NORMAL TO SAID PREFERRED SURFACE.
References Cited (Backward Citations)
US3316501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |