Patent US4710941A successfully refreshed from Google Patents.
US4710941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforated electrodes for efficient gas transfer in CW CO2 waveguide lasers
Assignee: United States Department of the Army
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Filing: 1986-11-26
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Granted: 1987-12-01
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Expires: 2006-11-26
Abstract
Abstract A gas laser is provided with elongated electrodes having apertures therein.he electrodes provide a transmission line for an HF electromagnetic pump which ionizes the gas, and the apertures are distributed and offset to provide passageways for efficient interaction between the hot ionized gas and a replenishing supply of cooled gas.
Inventors
- 👤 Elmer C. Sluss
- 👤 John E. Nettleton
- 👤 Dallas N. Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:22
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/038; H01S3/0385; H01S3/0315; H01S3/036; H01S3/04; H01S3/041; H01S3/09; H01S3/097; H01S3/0975
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
In a gas laser having a large closed container filled with a gaseous lasing medium and a smaller waveguide mounted in said medium with dielectric sidewalls and isolated elongated metal top and bottom electrodes joining said sidewalls, said electrodes having broad parallel opposing faces to couple to a radio frequency source and propagate radio frequency energy; the improvement comprising: a plurality of inner conduits formed through said electrodes normal to the said broad faces of said electrodes, whereby said gaseous medium when heated can flow transversely out of said waveguide through said top electrode and into said waveguide through said bottom electrode.
Claim 2
Dependent Claim
102 words
In a gas laser having a large closed container filled with a gaseous lasing medium and a smaller waveguide mounted in said medium with dielectric sidewalls and isolated elongated metal top and bottom electrodes joining said sidewalls, said electrodes having broad parallel opposing faces to couple to a radio frequency source and propagate radio frequency energy; the improvement comprising: a plurality of inner conduits formed through said electrodes normal to the said broad faces of said electrodes, whereby said gaseous medium when heated can flow transversely out of said waveguide through said top electrode and into said waveguide through said bottom electrode.
Claim 3
Dependent Claim
33 words
A gas laser according to claim 1 wherein: said conduits are staggered on each electrode to provide maximum interaction between the hot gas between said electrodes and the remaining gas in said container.
Claim 4
Dependent Claim
34 words
A gas laser according to claim 1 wherein: the conduits on one electrode of said pair are staggered relative to those on the other electrode to provide more diverse flow paths in said waveguide.
Claim 5
Dependent Claim
26 words
A gas laser according to claim 1 wherein: said conduits have a maximum cross-section less than 20% of the width of one of said broad faces.
Claim 6
Dependent Claim
36 words
A gas laser according to claim 1 wherein: said container is metal, one of said electrodes has a support portion connected to said container and said support portion includes outer conduits larger than said inner conduits.
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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |