Patent US3931590A successfully refreshed from Google Patents.
US3931590A
Expired / Lapsed
US
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Q-Switching device for glass lasers
Assignee: PPG Industries Inc
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Filing: 1974-01-17
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Granted: 1976-01-06
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Expires: 1994-01-17
Abstract
Abstract An improved Q-switched neodymium laser in which uranium as UO 2 + 2 and a uranium oxidizing agent such as cerium in a host body such as glass serve as either an external or an internal Q-switching device for the laser.
Inventors
- 👤 Charles B. Greenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:40
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/11; H01S3/1123; H01S3/113; H01S3/14; H01S3/16; H01S3/17
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
A Q-switching device for use in combination with a laser composed of a host body of glass containing a lasing element, said Q-switching device consisting essentially of the reaction product of a mixture of glass batch materials, a uranium salt reactive therewith and cerium dioxide, said cerium dioxide and uranium salt being present in amounts sufficient to provide a product containing from 0.01 to 20 percent CeO 2 based on the weight of the glass, and a total uranium content, expressed as UO 2 + 2 , of from 0.01 to 15 percent based on the weight of the glass, wherein at least 91 percent is present in the valence form UO 2 + 2 .
Claim 2
Dependent Claim
116 words
A Q-switching device for use in combination with a laser composed of a host body of glass containing a lasing element, said Q-switching device consisting essentially of the reaction product of a mixture of glass batch materials, a uranium salt reactive therewith and cerium dioxide, said cerium dioxide and uranium salt being present in amounts sufficient to provide a product containing from 0.01 to 20 percent CeO 2 based on the weight of the glass, and a total uranium content, expressed as UO 2 + 2 , of from 0.01 to 15 percent based on the weight of the glass, wherein at least 91 percent is present in the valence form UO 2 + 2 .
Claim 3
Dependent Claim
25 words
A laser containing a Q-switching device as described in claim 1 wherein the Q-switching device is external to the host body containing the lasing element.
References Cited (Backward Citations)
GB1136475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |