Patent US3087374A successfully refreshed from Google Patents.
US3087374A
Expired / Lapsed
US
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Optical maser elements
Assignee: AT&T Inc
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Filing: 1961-07-03
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Granted: 1963-04-30
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Expires: 1981-07-03
Abstract
No abstract record available.
Inventors
- 👤 George E Devlin
- 👤 Arthur L Schawlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:48
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/0602
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A COMPOSITE OPTICAL MASER ELEMENT COMPRISING A FIRST MEDIUM CONSISTING ESSENTIALLY OF A NEGATIVE TEMPERATURE MATERIAL, SAID FIRST MEDIUM HAVING A CYLINDRICAL GEOMETRY, AND A SECOND MEDIUM ESSENTIALLY SURROUNDING THE CURVED PORTIONS OF THE SURFACE OF THE SAID FIRST MEDIUM, THE OUTER SURFACE OF SAID SECOND MEDIUM HAVING A GEOMETRY ESSENTIALLY MATCHING THAT OF THE FIRST MEDIUM AND CONCENTRIC THEREWITH, SAID SECOND MEDIUM COMPRISING AN INACTIVE LIGHT TRANSPARENT MATERIAL HAVING A REFRACTIVE INDEX VALUE OF AT LEAST 95 PERCENT OF THE REFRACTIVE INDEX VALUE OF THE SAID FIRST MEDIUM AND A HEAT CONDUCTIVITY AT LEAST APPROXIMATELY EQUAL TO THAT OF THE SAID FIRST MEDIUM.
Claim 2
Dependent Claim
104 words
A COMPOSITE OPTICAL MASER ELEMENT COMPRISING A FIRST MEDIUM CONSISTING ESSENTIALLY OF A NEGATIVE TEMPERATURE MATERIAL, SAID FIRST MEDIUM HAVING A CYLINDRICAL GEOMETRY, AND A SECOND MEDIUM ESSENTIALLY SURROUNDING THE CURVED PORTIONS OF THE SURFACE OF THE SAID FIRST MEDIUM, THE OUTER SURFACE OF SAID SECOND MEDIUM HAVING A GEOMETRY ESSENTIALLY MATCHING THAT OF THE FIRST MEDIUM AND CONCENTRIC THEREWITH, SAID SECOND MEDIUM COMPRISING AN INACTIVE LIGHT TRANSPARENT MATERIAL HAVING A REFRACTIVE INDEX VALUE OF AT LEAST 95 PERCENT OF THE REFRACTIVE INDEX VALUE OF THE SAID FIRST MEDIUM AND A HEAT CONDUCTIVITY AT LEAST APPROXIMATELY EQUAL TO THAT OF THE SAID FIRST MEDIUM.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |