US4178509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitivity proportional counter window
Assignee: Bendix Corp
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Filing: 1978-06-02
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Granted: 1979-12-11
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Expires: 1998-06-02
Abstract
Abstract An improved sealed proportional counter window for an X-ray spectrometer includes a metallic foil having high X-ray transmission characteristics and having an ultra thin plastic coating thereon for sealing the inherent porosity of the metallic foil. The plastic coated foil is suitably supported by an arrangement which provides a relatively high percentage of unobstructed counter window area.
Inventors
- 👤 Keith A. More
- 👤 Donald R. Bianco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:25
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/001; H01J47/002; H01J47/004
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A window for a proportional counter used in an X-ray spectrometer, comprising: a thin metallic foil having a high X-ray transmission capability for passing a relatively wide range of X-ray spectra; the thin metallic foil having a thin plastic coating thereon which is essentially X-ray transparent; the proportional counter including a housing having an open area; and means supporting the thin plastic coated metallic foil and supported in the open area of the housing for providing a proportional counter window having a relatively large unobstructed window area.
Claim 2
Dependent Claim
87 words
A window for a proportional counter used in an X-ray spectrometer, comprising: a thin metallic foil having a high X-ray transmission capability for passing a relatively wide range of X-ray spectra; the thin metallic foil having a thin plastic coating thereon which is essentially X-ray transparent; the proportional counter including a housing having an open area; and means supporting the thin plastic coated metallic foil and supported in the open area of the housing for providing a proportional counter window having a relatively large unobstructed window area.
Claim 3
Dependent Claim
54 words
A window for a proportional counter as described by claim 1, wherein: the supporting means includes first and second grids, each of which includes an integral array of bars in corresponding spaced relation; and the thin plastic coated metallic foil is sandwiched between the first and second grids and covers the open portions thereof.
Claim 4
Dependent Claim
47 words
A window for a proportional counter as described by claim 2, wherein: the thin plastic coated metallic foil is joined to the first and second grids; and at least one of said grids is disposed in the open area of the housing and joined to the housing.
Claim 5
Dependent Claim
65 words
A window for a proportional housing as described by claim 2, wherein: one of the first and second grids is disposed in the open area of the housing and joined to the housing; and the thin plastic coated metallic foil is joined to the other of the first and second grids and is supported in the open area of the housing by the one grid.
Claim 6
Dependent Claim
52 words
A window for a proportional counter as described by claim 1, wherein: the supporting means includes a grid; the thin plastic coated metallic foil is joined to the grid and covers the open portion thereof; and the grid is disposed in the open area of the housing and joined to the housing.
Claim 7
Dependent Claim
29 words
A window for a proportional counter as described by claim 1, wherein: the thin metallic foil is inherently porous; and the thin plstic coating seals the porous metallic foil.
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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |