Patent US3679997A successfully refreshed from Google Patents.
US3679997A
Expired / Lapsed
US
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Noble gas-molecular nitrogen laser
Assignee: Original Hanau Quarzlampen GmbH
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Filing: 1970-10-21
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Granted: 1972-07-25
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Expires: 1990-10-21
Abstract
Abstract Optical transmitter or amplifier apparatus having as its operating medium a gas mixture including a noble gas and up to about one mole per cent of molecular nitrogen, said mixture being maintained at pressures such that the range of partial pressures of the noble gas is about 10 to 500 Torr.
Inventors
- 👤 Wolfgang Friedl
- 👤 Volker Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:27
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/22; H01S3/223; H01S3/2237
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
11 words
The laser of claim 1, wherein said noble gas is helium.
Claim 2
Dependent Claim
28 words
The laser as claimed in claim 2, comprising means to selectively excite the nitrogen molecules with an excitation energy at the initial levels of the negative nitrogen band.
Claim 3
Dependent Claim
11 words
The laser of claim 1, wherein said noble gas is argon.
Claim 4
Dependent Claim
24 words
The laser as claimed in claim 4, comprising means to selectively excite the nitrogen molecules at the argon gas levels excitation energy at s5(3P20).
Claim 5
Dependent Claim
24 words
The laser as claimed in claim 4, comprising means to selectively excite the nitrogen molecules at the argon gas levels excitation energy at s3(3PO0).
Claim 6
Dependent Claim
11 words
The laser of claim 1, wherein said noble gas is krypton.
Claim 7
Dependent Claim
24 words
The laser as claimed in claim 7, comprising means to selectively excite the nitrogen molecules at the krypton gas levels excitation energy at s5(3P20).
Claim 8
Dependent Claim
11 words
The laser of claim 1, wherein said noble gas is xenon.
Claim 9
Dependent Claim
23 words
The laser as claimed in claim 9, comprising means to selectively excite the nitrogen molecules at xenon gas level excitation energy at s5(3P20).
Claim 10
Dependent Claim
39 words
An laser as claimed in claim 1, in which the a discharge tube has the diameter which lies in the range of about 1 to 30 mm and is inversely proportional to the partial pressure of the noble gas.
Claim 11
Dependent Claim
46 words
An laser as claimed in claim 1, in which said exciting means so excites said mixture of gases that the molecules of nitrogen remain unionized while emitting coherent ultraviolet radiation, and, at the same time, substantially none of the atoms of said noble gas emit radiation.
References Cited (Backward Citations)
US3393372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |