Patent US2989938A successfully refreshed from Google Patents.
Patent US3140451A successfully refreshed from Google Patents.
US3140451A
Expired / Lapsed
US
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Optical maser device
Assignee: AT&T Inc
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Filing: 1960-10-25
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Granted: 1964-07-07
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Expires: 1980-10-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:28
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/0602; H01S3/0604; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/093; H01S3/0627; H01S3/08; H01S3/081; H01S3/083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
AN OPTICAL DEVICE FOR PRODUCING STIMULATED EMISSION OF RADIATION COMPRISING A SOLID BODY OF A MATERIAL CAPABLE OF EXHIBITING A NEGATIVE TEMPERATURE, THE GEOMETRICAL SHAPE OF SAID BODY CONSISTING OF AT LEAST A SPHERICAL SECTION INCLUDING A GREAT CIRCLE DIMENSION, AND A PUMP SOURCE DISPOSED AROUND SAID CAVITY WITH ITS RADIANT ENERGY INCIDENT ON SAID NEGATIVE TEMPERATURE MEDIUM WITHIN THE CAVITY, THE RADIATION OF SAID PUMP SOURCE HAVING A FREQUENCY CORRESPONDING TO THE FREQUENCY REQUIRED TO ESTABLISH A NEGATIVE TEMPERATURE CONDITION WITHIN SAID MEDIUM, 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
Dependent Claim
108 words
AN OPTICAL DEVICE FOR PRODUCING STIMULATED EMISSION OF RADIATION COMPRISING A SOLID BODY OF A MATERIAL CAPABLE OF EXHIBITING A NEGATIVE TEMPERATURE, THE GEOMETRICAL SHAPE OF SAID BODY CONSISTING OF AT LEAST A SPHERICAL SECTION INCLUDING A GREAT CIRCLE DIMENSION, AND A PUMP SOURCE DISPOSED AROUND SAID CAVITY WITH ITS RADIANT ENERGY INCIDENT ON SAID NEGATIVE TEMPERATURE MEDIUM WITHIN THE CAVITY, THE RADIATION OF SAID PUMP SOURCE HAVING A FREQUENCY CORRESPONDING TO THE FREQUENCY REQUIRED TO ESTABLISH A NEGATIVE TEMPERATURE CONDITION WITHIN SAID MEDIUM, 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)
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |