Patent US4953174A successfully refreshed from Google Patents.
US4953174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preionization electrode for pulsed gas laser
Assignee: Raytheon Co
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Filing: 1989-10-23
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Granted: 1990-08-28
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Expires: 2009-10-23
Abstract
Abstract A laser preionization electrode (15, 17) formed of a dielectric tube (16) of square cross-section enclosing an electrode (18) of circular cross-section, the electrode (18) being of a large diameter on the order of 6.35 millimeters. A pair of such electrodes (15, 17) are located on either side of a main electrode (11) in a laser with the result that longer length preionization electrodes may be constructed while eliminating alignment problems of the prior art.
Inventors
- 👤 Robert E. Eldridge
- 👤 David B. Cohn
- 👤 Wayde H. Affleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:48
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/0971; H01S3/09713; H01S3/02; H01S3/03; H01S3/038; H01S3/0385; H01S3/0384
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
32 words
Laser preionizer apparatus comprising: a dielectric tube of rectangular cross-section; and an electrode of circular cross-section disposed within said tube and having a diameter in the range of 3 to 9 millimeters.
Claim 2
Dependent Claim
32 words
Laser preionizer apparatus comprising: a dielectric tube of rectangular cross-section; and an electrode of circular cross-section disposed within said tube and having a diameter in the range of 3 to 9 millimeters.
Claim 3
Dependent Claim
13 words
The preionizer apparatus of claim 1 wherein said electrode comprises a metal rod.
Claim 4
Dependent Claim
14 words
The preionizer of claim 2 wherein said metal rod slip fits into said tube.
Claim 5
Dependent Claim
15 words
The preionizer apparatus of claim 1 wherein said electrode comprises metallization deposited within said tube.
Claim 6
Dependent Claim
16 words
The preionizer apparatus of claim 2 wherein the diameter of said metal rod is 6.35 millimeters.
Claim 7
Dependent Claim
14 words
The preionizer apparatus of claim 5 wherein said dielectric tube comprises a ceramic material.
Claim 8
Dependent Claim
14 words
The preionizer apparatus of claim 2 wherein said dielectric tube is square in cross-section.
Claim 9
Dependent Claim
18 words
The preionizer apparatus of claim 7 wherein said dielectric tube is on the order of 12 millimeters square.
Claim 10
Dependent Claim
63 words
A laser comprising: a housing having first and second opposing sides; first and second main electrodes mounted respectively on said first and second opposing sides; and first and second preionization electrodes mounted on either side of one of said first and second main electrodes, said first and second preionization electrodes each comprising a rectangular dielectric tube surrounding a conductive electrode of circular cross-section.
Claim 11
Dependent Claim
63 words
A laser comprising: a housing having first and second opposing sides; first and second main electrodes mounted respectively on said first and second opposing sides; and first and second preionization electrodes mounted on either side of one of said first and second main electrodes, said first and second preionization electrodes each comprising a rectangular dielectric tube surrounding a conductive electrode of circular cross-section.
Claim 12
Dependent Claim
13 words
The laser of claim 9 wherein said rectangular tube comprises a square tube.
Claim 13
Dependent Claim
16 words
The laser of claim 10 wherein said tube is on the order of 12 millimeters square.
Claim 14
Dependent Claim
20 words
The laser of claim 10 wherein said conductive electrode is in the range of 3 to 9 millimeters in diameter.
Claim 15
Dependent Claim
15 words
The laser of claim 9 wherein said conductive tube is substantially 6.35 millimeters in diameter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |