US3577207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave plasmatron
Assignee: Individual
•
Filing: 1969-05-07
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Granted: 1971-05-04
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Expires: 1989-05-07
Abstract
Abstract A device for producing low-temperature plasma of microwave discharge at atmospheric pressure of a plasma-forming gas suitable for conducting chemical reactions of extreme purity, depositing thin films, growing crystals, producing powders and other technological purposes. The device includes a spherical or radial waveguide wherein there is excited a converging symmetrical electromagnetic wave, and a discharge tube disposed on the axis of symmetry of the waveguide.
Inventors
- 👤 Vladimir Pavlovich Kirjushin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:35
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/32009; H01J37/32192; H01J37/32211; H01J37/32247; H05; H05H; H05H1/00; H05H1/24; H05H1/46
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
52 words
A plasmatron, as claimed in claim 1, iN which the slots are arranged along the entire length of the waveguide and separated from center to center by a distance equal to a half-wavelength of the input microwave energy, adjacent slots being located on opposite sides from the longitudinal axis of the waveguide.
Claim 2
Dependent Claim
53 words
A plasmatron, as claimed in claim 1, in which the slots are arranged along the entire length of the waveguide and separated from center to center by a distance equal to the wavelength of the input microwave energy, all said slots being located on one side from the long axis of the waveguide.
Claim 3
Dependent Claim
30 words
A plasmatron, as claimed in claim 1, in which the waveguide is a hollow torus in which microwave energy propagates in equal amounts both ways from the place of entry.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |