Patent US3659221A successfully refreshed from Google Patents.
US3659221A
Expired / Lapsed
US
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Laser material
Assignee: Westinghouse Electric Corp
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Filing: 1971-03-16
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Granted: 1972-04-25
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Expires: 1991-03-16
Abstract
Abstract A composition of matter which can be used as a laser crystal in a laser generator and which can be doped with Cr sensitizer ions has the empirical chemical formula CaY4 x (SiO4)3O: Hox where x has a value from 0.001 to 1. The invention herein described was made in the course of or under a contract or subcontract thereunder with the Department of the Air Force (Contract F3361568 C-1129).
Inventors
- 👤 Nathan T Melamed
- 👤 George W Roland
- 👤 Richard H Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:58
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/77742
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
15 words
The laser generator of claim 1, wherein x has a value between 0.001 and 0.30.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |