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Patent US4960990A successfully refreshed from Google Patents.
US4960990A
Expired / Lapsed
US
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Non coherent photoneutralizer
Assignee: United States Department of the Army
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Filing: 1989-12-26
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Granted: 1990-10-02
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Expires: 2009-12-26
Abstract
Abstract A non-coherent photoneutralizer that has a fluorescent light source for neutralizing a negative ion beam as it is passed through a housing in which the fluorescent light source is mounted.
Inventors
- 👤 Michael J. Lavan
- 👤 George R. Edlin
- 👤 Daniel L. Whitener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:56
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
A non-coherent photoneutralizer comprising a housing that is elongated and elliptical in cross-section, said housing having end members that close the elongated structure, internal surfaces of said end members and internal surfaces of said elongated housing being reflective relative to light rays, a fluorescent light source mounted in said elongated body between said end members, and each of said end members having an opening there through with the openings being aligned to allow a ion beam to be projected along a straight line from one end of said elongated housing to the other end of said elongated housing to allow said fluorescent light source to irradiate the ion beam when it is projected through said elongated housing.
Claim 2
Dependent Claim
117 words
A non-coherent photoneutralizer comprising a housing that is elongated and elliptical in cross-section, said housing having end members that close the elongated structure, internal surfaces of said end members and internal surfaces of said elongated housing being reflective relative to light rays, a fluorescent light source mounted in said elongated body between said end members, and each of said end members having an opening there through with the openings being aligned to allow a ion beam to be projected along a straight line from one end of said elongated housing to the other end of said elongated housing to allow said fluorescent light source to irradiate the ion beam when it is projected through said elongated housing.
Claim 3
Dependent Claim
19 words
A non-coherent photoneutralizer as set forth in claim 1, wherein said reflective surfaces have a reflectivity of about 0.995.
Claim 4
Dependent Claim
21 words
A non-coherent photoneutralizer as set forth in claim 2, wherein said elongated housing has a shape in cross-section which is elliptical.
Claim 5
Dependent Claim
35 words
A non-coherent photoneutralizer as set forth in claim 3, wherein said fluorescent light source is a single fluorescent tube and said fluorescent tube is mounted at one focus of an ellipse of said elliptical shape.
Claim 6
Dependent Claim
28 words
A non-coherent photoneutralizer as set forth in claim 4, wherein said openings in said end members are located at another focus of said ellipse of said elliptical shape.
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) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |