Patent US4879469A successfully refreshed from Google Patents.
US4879469A
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Mixed media for kinestatic charge detectors
Assignee: University of North Carolina at Chapel Hill
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Filing: 1988-05-13
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Granted: 1989-11-07
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Expires: 2008-05-13
Abstract
Abstract A detection medium for a kinestatic charge detector is a mixture of gases, typically including at least one noble gas such as zenon or krypton. The medium can be pressurized to improve resolution and temperature can also be applied to the medium for improving resolution. Various additive or dopant gases can also be introduced to improve resolution.
Inventors
- 👤 Frank A. DiBianca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:52
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/185; H; H01; H01J; H01J47/00; H01J47/001; H01J47/005
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
48 words
A detection medium for use in a kinestatic charge detector, said medium comprising a mixture of xenon gas and one or more gases containing molecules composed on one or more atomic constituents, wherein at least one of said gases has a higher atomic number than said xenon gas.
Claim 2
Dependent Claim
48 words
A detection medium for use in a kinestatic charge detector, said medium comprising a mixture of xenon gas and one or more gases containing molecules composed on one or more atomic constituents, wherein at least one of said gases has a higher atomic number than said xenon gas.
Claim 3
Dependent Claim
15 words
A medium as set forth in claim 1, wherein said mixture includes tungsten hexafluoride gas.
Claim 4
Dependent Claim
45 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of xenon gas and one or more gases containing molecules composed of one or more atomic constituents, at least one of said gases having a lower atomic number than said xenon gas.
Claim 5
Dependent Claim
45 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of xenon gas and one or more gases containing molecules composed of one or more atomic constituents, at least one of said gases having a lower atomic number than said xenon gas.
Claim 6
Dependent Claim
17 words
A medium as set forth in claim 3, wherein said mixture with xenon gas includes krypton gas.
Claim 7
Dependent Claim
17 words
A medium as set forth in claim 3, wherein said mixture with xenon gas includes HBr gas.
Claim 8
Dependent Claim
25 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of at least two of the noble gases xenon, krypton and argon.
Claim 9
Dependent Claim
25 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of at least two of the noble gases xenon, krypton and argon.
Claim 10
Dependent Claim
19 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of xenon gas and trimethylamine (TMA).
Claim 11
Dependent Claim
19 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of xenon gas and trimethylamine (TMA).
Claim 12
Dependent Claim
19 words
A medium as set forth in claim 7, wherein said mixture comprises 10 -5 mole fraction of said TMA.
Claim 13
Dependent Claim
19 words
A medium as set forth in claim 7, wherein said mixture comprises 10 -4 mole fraction of said TMA.
Claim 14
Dependent Claim
19 words
A medium as set forth in claim 7, wherein said mixture comprises 10 -3 mole fraction of said TMA.
Claim 15
Dependent Claim
19 words
A medium as set forth in claim 7, wherein said mixture comprises 10 -2 mole fraction of said TMA.
Claim 16
Dependent Claim
19 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of krypton gas and trimethylamine (TMA).
Claim 17
Dependent Claim
19 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of krypton gas and trimethylamine (TMA).
Claim 18
Dependent Claim
17 words
A medium as set forth in claim 12, wherein said mixture comprises a pressure of 15 atmospheres.
Claim 19
Dependent Claim
17 words
A medium as set forth in claim 12, wherein said mixture comprises a pressure of 25 atmospheres.
Claim 20
Dependent Claim
17 words
A medium as set forth in claim 12, wherein said mixture comprises a pressure of 35 atmosphere.
Claim 21
Dependent Claim
19 words
A medium as set forth in claim 12, wherein said mixture comprises 10 -3 mole fraction of said TMA.
Claim 22
Dependent Claim
32 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of low ionization potential dopant gases, said mixture comprising at least one of the xenon, krypton and argon gases.
Claim 23
Dependent Claim
32 words
A kinestatic charge detector comprising a detection medium, said medium comprising a mixture of low ionization potential dopant gases, said mixture comprising at least one of the xenon, krypton and argon gases.
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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) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |