US3149290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas optical maser
Assignee: AT&T Inc
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Filing: 1960-12-28
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Granted: 1964-09-15
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Expires: 1980-12-28
Abstract
No abstract record available.
Inventors
- 👤 Jr William R Bennett
- 👤 Javan Ali
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:42
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/50; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/0971; H01S3/09713; H01S3/14; H01S3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
229 words
AN OPTICAL MASER COMPRISING AN ACTIVE MEDIUM CONSISTING OF A FIRST AND A SECOND GAS, THE FIRST GAS HAVING A METASTABLE ENERGY LEVEL ABOVE ITS GROUND STATE AND THE SECOND GAS HAVING AT LEAST TWO LEVELS ABOVE THE GROUND STATE, THE SEPARATION OF THE HIGHER OF SAID TWO LEVELS FROM THE GROUND STATE SUBSTANTIALLY MATCHING THE SEPARATION OF SAID METASTABLE LEVEL FROM ITS GROUND STATE, MEANS FOR HOUSING SAID ACTIVE MEDIUM, MEANS FOR PRODUCING FREE ELECTRONS IN SAID MEDIUM FOR COLLIDING WITH AND RISING ATOMS OF THE FIRST GAS TO THE METASTABLE STATE, SAID ATOMS IN THE METASTABLE STATE BEING EFFECTIVE TO TRANSFER ENERGY BY INELASTIC COLLISIONS OF THE SECOND KIND TO THE MATCHING ENERGY LEVEL OF THE SECOND GAS, SAID ENERGY TRANSFER PROCEEDING AT A RATE SUFFICIENT TO PRODUCE A NEGATIVE TEMPERATURE STATE IN SAID SECOND GAS, MEANS FOR SUBSTANTIALLY LESSENING THE INTERACTION OF FREE ELECTRONS WITH THE ACTIVE MEDIUM IN WHICH A NEGATIVE TEMPERATURE IS PRODUCED BY REDUCING THE CONCENTRATION OF FREE ELECTRONS IN A REGION WHEREIN THERE EXISTS A SUBSTANTIAL CONCENTRATION OF METASTABLE ATOMS OF SAID FIRST GAS OR OF ATOMS OF SAID SECOND GAS IN THE HIGHER OF SAID ENERGY LEVELS, MEANS FOR ESTABLISHING A STANDING WAVE OF THE FREQUENCY CORRESPONDING TO THE SEPARATION OF SAID TWO LEVELS ABOVE THE GROUND STATE OF THE SECOND GAS AND MEANS FOR UTILIZING EMITTED RADIATION OF SAID FREQUENCY.
Claim 2
Dependent Claim
229 words
AN OPTICAL MASER COMPRISING AN ACTIVE MEDIUM CONSISTING OF A FIRST AND A SECOND GAS, THE FIRST GAS HAVING A METASTABLE ENERGY LEVEL ABOVE ITS GROUND STATE AND THE SECOND GAS HAVING AT LEAST TWO LEVELS ABOVE THE GROUND STATE, THE SEPARATION OF THE HIGHER OF SAID TWO LEVELS FROM THE GROUND STATE SUBSTANTIALLY MATCHING THE SEPARATION OF SAID METASTABLE LEVEL FROM ITS GROUND STATE, MEANS FOR HOUSING SAID ACTIVE MEDIUM, MEANS FOR PRODUCING FREE ELECTRONS IN SAID MEDIUM FOR COLLIDING WITH AND RISING ATOMS OF THE FIRST GAS TO THE METASTABLE STATE, SAID ATOMS IN THE METASTABLE STATE BEING EFFECTIVE TO TRANSFER ENERGY BY INELASTIC COLLISIONS OF THE SECOND KIND TO THE MATCHING ENERGY LEVEL OF THE SECOND GAS, SAID ENERGY TRANSFER PROCEEDING AT A RATE SUFFICIENT TO PRODUCE A NEGATIVE TEMPERATURE STATE IN SAID SECOND GAS, MEANS FOR SUBSTANTIALLY LESSENING THE INTERACTION OF FREE ELECTRONS WITH THE ACTIVE MEDIUM IN WHICH A NEGATIVE TEMPERATURE IS PRODUCED BY REDUCING THE CONCENTRATION OF FREE ELECTRONS IN A REGION WHEREIN THERE EXISTS A SUBSTANTIAL CONCENTRATION OF METASTABLE ATOMS OF SAID FIRST GAS OR OF ATOMS OF SAID SECOND GAS IN THE HIGHER OF SAID ENERGY LEVELS, MEANS FOR ESTABLISHING A STANDING WAVE OF THE FREQUENCY CORRESPONDING TO THE SEPARATION OF SAID TWO LEVELS ABOVE THE GROUND STATE OF THE SECOND GAS AND MEANS FOR UTILIZING EMITTED RADIATION OF SAID FREQUENCY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |