Patent US4759027A successfully refreshed from Google Patents.
US4759027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas laser
Assignee: Siemens AG
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Filing: 1987-04-02
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Granted: 1988-07-19
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Expires: 2007-04-02
Abstract
Abstract A laser discharge tube is provide having a ceramic rod of rectangular cross section through which extends a discharge channel and at least one gas return channel, and cooling plates affixed at the larger outside surfaces of the rectangular ceramic rod.
Inventors
- 👤 Guenther Hahn
- 👤 Hans Krueger
- 👤 Herbert Lamprecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:13
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/032; H01S3/0323; H01S3/036; H01S3/04; H01S3/041
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A gas laser having a discharge channel and at least one gas return channel extending between a pair of electrode parts, both channels extending through a ceramic rod, cooling devices being affixed to said ceramic rod and mirrors being held by said ceramic rod for optically resonating a laser emission of said gas laser, comprising: said ceramic rod has a substantially rectangular cross section and includes at least one gas return channel separate from said discharge channel; said cooling devices being affixed to outside surfaces of said rectangular ceramic rod at a slight distance from said discharge channel.
Claim 2
Dependent Claim
98 words
A gas laser having a discharge channel and at least one gas return channel extending between a pair of electrode parts, both channels extending through a ceramic rod, cooling devices being affixed to said ceramic rod and mirrors being held by said ceramic rod for optically resonating a laser emission of said gas laser, comprising: said ceramic rod has a substantially rectangular cross section and includes at least one gas return channel separate from said discharge channel; said cooling devices being affixed to outside surfaces of said rectangular ceramic rod at a slight distance from said discharge channel.
Claim 3
Dependent Claim
23 words
A gas laser as claimed in claim 1, wherein said discharge channel lies substantially along an axis of symmetry of said ceramic rod.
Claim 4
Dependent Claim
27 words
A gas laser as claimed in claim 1, wherein said cooling devices are cooling plates affixed only to broader ones of outside surfaces of said ceramic rod.
Claim 5
Dependent Claim
22 words
A gas laser as claimed in claim 3, wherein said cooling plates are of substantially the same width as said ceramic rod.
Claim 6
Dependent Claim
41 words
A gas laser as claimed in claim 1, wherein said ceramic rod includes 2n gas return channels wherein n is a positive whole number, said gas return channels being uniformly distributed and symmetrically spaced at both sides of said discharge channel.
Claim 7
Dependent Claim
62 words
A discharge tube for use in a gas laser, comprising: an elongated ceramic body of generally rectangular cross section having: a longitudinally extending discharge channel in said ceramic body, and at least one longitudinally extending gas return channel in said ceramic body; and a plurality of heat conductive cooling plates affixed to at least two opposed elongated surfaces of said ceramic body.
Claim 8
Dependent Claim
62 words
A discharge tube for use in a gas laser, comprising: an elongated ceramic body of generally rectangular cross section having: a longitudinally extending discharge channel in said ceramic body, and at least one longitudinally extending gas return channel in said ceramic body; and a plurality of heat conductive cooling plates affixed to at least two opposed elongated surfaces of said ceramic body.
Claim 9
Dependent Claim
33 words
A discharge tube as claimed in claim 6, wherein said elongated ceramic body has a greater width than height, and said cooling plates are affixed only along the width of said ceramic body.
Claim 10
Dependent Claim
32 words
A discharge tube as claimed in claim 6, further comprising: two of said gas return channels being disposed on opposite sides of and spaced from said discharge channel in said ceramic body.
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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) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |