US3144617A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical maser with convex negative temperature medium extremities
Assignee: AT&T Inc
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Filing: 1961-12-29
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Granted: 1964-08-11
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Expires: 1981-12-29
Abstract
No abstract record available.
Inventors
- 👤 Herwig W Kogelnik
- 👤 William W Rigrod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:07
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AN OPTICAL MASER COMPRISING AN ELONGATED NEGATIVE TEMPERATURE MEDIUM CHARACTERIZED BY A PRINCIPAL AXIS, MEANS FOR APPLYING PUMP ENERGY TO SAID MEDIUM FOR ESTABLISHING A POPULATION INVERSION THEREIN, AN ELONGATED OPTICAL INTERFEROMETER RESONANT CAVITY COMPRISING FIRST AND SECOND EXTERNAL REFLECTIVE END MEMBERS, MEANS FOR ABSTRACTING ENERGY FROM SAID CAVITY, SAID NEGATIVE TEMPERATURE MEDIUM BEING DISPOSED WITHIN SAID CAVITY AND POSITIONED WITH SAID AXIS SUBSTANTIALLY NORMAL TO SAID END MEMBERS, THE AXIAL EXTREMITIES OF SAID MEDIUM COMPRISING MEANS FOR FOCUSING OPTICAL ENERGY, SAID FOCUSING MEANS HAVING BI-CYLINDRICAL SURFACE CURVATURE.
Claim 2
Dependent Claim
88 words
AN OPTICAL MASER COMPRISING AN ELONGATED NEGATIVE TEMPERATURE MEDIUM CHARACTERIZED BY A PRINCIPAL AXIS, MEANS FOR APPLYING PUMP ENERGY TO SAID MEDIUM FOR ESTABLISHING A POPULATION INVERSION THEREIN, AN ELONGATED OPTICAL INTERFEROMETER RESONANT CAVITY COMPRISING FIRST AND SECOND EXTERNAL REFLECTIVE END MEMBERS, MEANS FOR ABSTRACTING ENERGY FROM SAID CAVITY, SAID NEGATIVE TEMPERATURE MEDIUM BEING DISPOSED WITHIN SAID CAVITY AND POSITIONED WITH SAID AXIS SUBSTANTIALLY NORMAL TO SAID END MEMBERS, THE AXIAL EXTREMITIES OF SAID MEDIUM COMPRISING MEANS FOR FOCUSING OPTICAL ENERGY, SAID FOCUSING MEANS HAVING BI-CYLINDRICAL SURFACE CURVATURE.
References Cited (Backward Citations)
US3055257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |