Patent US3564451A successfully refreshed from Google Patents.
US3564451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivotally adjustable q-switched laser operating in the far-infrared or sub-millimeter region
Assignee: Hitachi Ltd
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Filing: 1967-10-04
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Granted: 1971-02-16
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Expires: 1987-10-04
Abstract
Abstract A LASER DEVICE PERFORMING A Q-SWITCH OPERATION, WHEREIN AT LEAST ONE OF A PAIR OF END PARALLEL REFLECTING MEMBERS COMPOSING A LASER RESONATOR IS AN ORTHOGONAL DI HEDRAL MEMBER. IN THIS DEVICE, THE RIGHT-ANGLED EDGE OF SAID REFLECTING MEMBER IS PLACED VERTICALLY TO THE OPTICAL AXIS OF THE RESONATOR AND MEANS ARE PROVIDED FOR ROTATING SAID MEMBER ABOUT AN AXIS VERTICAL TO SAID RIGHT- ANGLED EDGED AND THE OPTICAL AXIS AND FOR ROTATING THE SAME REFLECTING MEMBER SLOWLY ALONG THE SURFACE INCLUDING SAID AXIS OF VERTICAL ROTATION AND THE OPTICAL AXIS WITH A POINT OFF SAID OPTICAL AXIS AS A FULCRUM.
Inventors
- 👤 Mitsuyoshi Shimazu
- 👤 Yasuzi Suzaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:00
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/11; H01S3/1123; H01S3/121; H01S3/05; H01S3/08; H01S3/086; H01S3/123; H01S3/125
Claims Analysis
Total Claims: 0
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |