US5172389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas laser apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1990-02-01
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Granted: 1992-12-15
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Expires: 2010-02-01
Abstract
Abstract A gas laser apparatus includes an insulating material layer covering the outside of a pair of metal electrodes disposed on the outer peripheral surface of a dielectric discharge tube. The insulating material layer thus provided electrically separates the metal electrodes and prevents a dielectric tube which would otherwise occur through an air gap between adjacent portions of the metal electrodes when a high-frequency voltage is applied across the metal electrodes.
Inventors
- 👤 Naoya Horiuchi
- 👤 Hitoshi Hongu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:16
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/038; H01S3/0385; H01S3/0387; H01S3/09; H01S3/097; H01S3/0975
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A gas laser apparatus comprising: (a) a discharge tube formed of a dielectric material and containing a gas; (b) a pair of electrodes disposed on an outer peripheral surface of said discharge tube in confronting relation to one another; (c) a layer of insulating material covering the entire outside surfaces of the respective electrodes and portions of an outer peripheral surface of said discharge tube extending between said electrodes; and (d) means for applying a high-frequency voltage across said pair of electrodes for producing a discharge of said gas contained in said discharge tube.
Claim 2
Dependent Claim
94 words
A gas laser apparatus comprising: (a) a discharge tube formed of a dielectric material and containing a gas; (b) a pair of electrodes disposed on an outer peripheral surface of said discharge tube in confronting relation to one another; (c) a layer of insulating material covering the entire outside surfaces of the respective electrodes and portions of an outer peripheral surface of said discharge tube extending between said electrodes; and (d) means for applying a high-frequency voltage across said pair of electrodes for producing a discharge of said gas contained in said discharge tube.
Claim 3
Dependent Claim
24 words
A gas laser apparatus according to claim 1, wherein said electrodes extend helically around said discharge tube in parallel spaced relation to one another.
Claim 4
Dependent Claim
19 words
A gas laser apparatus according to claim 1, wherein said insulating material layer comprises a film of a ceramic.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-15 | 1996-06-15 | 1996-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-15 | 2000-06-15 | 2000-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-15 | 2004-06-15 | 2004-12-15 | $7700.00 | Window Closed / Lapsed |