Patent US3215949A successfully refreshed from Google Patents.
US3215949A
Expired / Lapsed
US
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Optical maser using internal reflection
Assignee: AT&T Inc
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Filing: 1960-10-25
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Granted: 1965-11-02
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Expires: 1980-10-25
Abstract
No abstract record available.
Inventors
- 👤 Charles G B Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:51
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/0602; H01S3/0608; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A DEVICE FOR GENERATING OR AMPLIFYING COHERENT ELECTROMAGNETIC ENERGY IN THE LIGHT FREQUENCY RANGE WHICH COMPRISES A DIELECTRIC CRYSTAL BODY HAVING THE SHAPE OF A REGULAR PRISM, SAID CRYSTAL BODY HAVING ITS SURFACES POLISHED FLAT TO WITHIN 10-4CM., ITS PERPENDICULAR ANGLES ACCURATE TO WITHIN 3 MINUTES OF AN ARC, AND HAVING A MAXIMUM LINEAR DIMENSION OF TEN CENTIMETERS, SAID CRYSTAL BODY FURTHER CONSISTING OF A NEGATIVE TEMPERATURE MEDIUM THE FACES OF WHICH ARE ESSENTIALLY TRANSPARENT TO PERPENDICULARLY INCIDENT LIGHT, MEANS ASSOCIATED WITH SAID CRYSTAL BODY FOR INTRODUCING LIGHT FREQUENCY PUMP RADIATION INTO THE CRYSTAL, A MEDIUM SURROUNDING SAID CRYSTAL WHICH IS TRANSPARENT TO THE PUMP RADIATION AND WHICH HAS A REFRACTIVE INDEX AS RELATED TO THE REFRACTIVE INDEX OF THE CRYSTAL SUCH THAT LIGHT WITHIN THE CRYSTAL MAYY BE RETAINED THEREIN BY INTERNAL REFLECTIONS, AND OUTPUT MEANS COUPLED WITH SAID CAVITY TO EXTRACT COHERENT RADIATION FROM THE CAVITY, SAID OUTPUT MEANS COMPRISING A DISCONTINUITY IN THE DIELECTRIC SURFACE.
Claim 2
Independent Claim
158 words
A DEVICE FOR GENERATING OR AMPLIFYING COHERENT ELECTROMAGNETIC ENERGY IN THE LIGHT FREQUENCY RANGE WHICH COMPRISES A DIELECTRIC CRYSTAL BODY HAVING THE SHAPE OF A REGULAR PRISM, SAID CRYSTAL BODY HAVING ITS SURFACES POLISHED FLAT TO WITHIN 10-4CM., ITS PERPENDICULAR ANGLES ACCURATE TO WITHIN 3 MINUTES OF AN ARC, AND HAVING A MAXIMUM LINEAR DIMENSION OF TEN CENTIMETERS, SAID CRYSTAL BODY FURTHER CONSISTING OF A NEGATIVE TEMPERATURE MEDIUM THE FACES OF WHICH ARE ESSENTIALLY TRANSPARENT TO PERPENDICULARLY INCIDENT LIGHT, MEANS ASSOCIATED WITH SAID CRYSTAL BODY FOR INTRODUCING LIGHT FREQUENCY PUMP RADIATION INTO THE CRYSTAL, A MEDIUM SURROUNDING SAID CRYSTAL WHICH IS TRANSPARENT TO THE PUMP RADIATION AND WHICH HAS A REFRACTIVE INDEX AS RELATED TO THE REFRACTIVE INDEX OF THE CRYSTAL SUCH THAT LIGHT WITHIN THE CRYSTAL MAYY BE RETAINED THEREIN BY INTERNAL REFLECTIONS, AND OUTPUT MEANS COUPLED WITH SAID CAVITY TO EXTRACT COHERENT RADIATION FROM THE CAVITY, SAID OUTPUT MEANS COMPRISING A DISCONTINUITY IN THE DIELECTRIC SURFACE.
References Cited (Backward Citations)
US2424267A
Cited
US2851652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |