Patent US3153204A successfully refreshed from Google Patents.
US3153204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser assembly
Assignee: Associated Electrical Industries Ltd
•
Filing: 1962-08-14
•
Granted: 1964-10-13
•
Expires: 1982-08-14
Abstract
No abstract record available.
Inventors
- 👤 Dunsmuir Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:54
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/0602
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A LASER ASSEMBLY COMPRISING A LASER CRYSTAL, SAID LASER CRYSTAL HAVING SYMMETRICALLY DISPOSED END FACES, A REFLECTING SURFACE UNIFORMLY SPACED APART FROM AT LEAST ONE OF SAID END FACES, SAID REFLECTING SURFACE HAVING A CONTOUR SIMILAR TO THAT OF SAID END FACE ADJACENT THERETO, A LIGHT TRANSMITTING MEDIUM OCCUPYING AT LEAST ONE OF SAID SPACES BETWEEN A REFLECTING SURFACE AND THE END FACE OF SAID CRYSTAL ADJACENT THERETO, SAID MEDIUM HAVING A REFRACTIVE INDEX SUBSTANTIALLY EQUAL TO THAT OF SAID CRYSTAL, SAID SPACE BETWEEN SAID REFLECTING SURFACE AND SAID END FACE ADJACENT THERETO BEING CHOSEN SUCH THAT A CHANGE IN THE LENGTH OF SAID CRYSTAL PRODUCED BY A VARIATION IN TEMPERATURE THEREOF PRODUCES SUCH A VARIATION IN SAID SPACE AS TO OPTICALLY COMPENSATE FOR THE AGGREGATE CHANGE IN THE REFREACTIVE INDEX OF SAID CRYSTAL AND SAID MEDIUM, ALSO PRODUCED BY SAID VARIATION OF TEMPERATURE.
Claim 2
Dependent Claim
144 words
A LASER ASSEMBLY COMPRISING A LASER CRYSTAL, SAID LASER CRYSTAL HAVING SYMMETRICALLY DISPOSED END FACES, A REFLECTING SURFACE UNIFORMLY SPACED APART FROM AT LEAST ONE OF SAID END FACES, SAID REFLECTING SURFACE HAVING A CONTOUR SIMILAR TO THAT OF SAID END FACE ADJACENT THERETO, A LIGHT TRANSMITTING MEDIUM OCCUPYING AT LEAST ONE OF SAID SPACES BETWEEN A REFLECTING SURFACE AND THE END FACE OF SAID CRYSTAL ADJACENT THERETO, SAID MEDIUM HAVING A REFRACTIVE INDEX SUBSTANTIALLY EQUAL TO THAT OF SAID CRYSTAL, SAID SPACE BETWEEN SAID REFLECTING SURFACE AND SAID END FACE ADJACENT THERETO BEING CHOSEN SUCH THAT A CHANGE IN THE LENGTH OF SAID CRYSTAL PRODUCED BY A VARIATION IN TEMPERATURE THEREOF PRODUCES SUCH A VARIATION IN SAID SPACE AS TO OPTICALLY COMPENSATE FOR THE AGGREGATE CHANGE IN THE REFREACTIVE INDEX OF SAID CRYSTAL AND SAID MEDIUM, ALSO PRODUCED BY SAID VARIATION OF TEMPERATURE.
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |