US4057728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray exposure device comprising a gas-filled chamber
Assignee: US Philips Corp
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Filing: 1976-02-06
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Granted: 1977-11-08
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Expires: 1996-02-06
Abstract
Abstract An x-ray exposure device comprising a flat and plane rectangular chamber containing an ionizable gas and having walls provided with electrode structures which generate a potential distribution corresponding to that of two concentric spherical electrodes, an insulating foil on which charge carriers resulting from ionization of the gas by the x-radiation and displaceable in the longitudinal direction of the chamber being arranged therewithin.
Inventors
- 👤 Kristian Peschmann
- 👤 Hans-Georg Junginger
- 👤 Hans-Jurgen Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:48
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/054; G03G15/0545
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
An X-ray exposure device comprising a flat and plane rectangular chamber filled with an ionizable gas, electrode structures disposed on the walls of the chamber which generate a potential distribution corresponding to that of two concentric spherical electrodes having a given central axis during operation, and an insulating foil on which charge carriers resulting from ionization of the gas by X-radiation are incident and displaceable in the longitudinal direction within the chamber for producing a latent charge image thereon.
Claim 2
Dependent Claim
79 words
An X-ray exposure device comprising a flat and plane rectangular chamber filled with an ionizable gas, electrode structures disposed on the walls of the chamber which generate a potential distribution corresponding to that of two concentric spherical electrodes having a given central axis during operation, and an insulating foil on which charge carriers resulting from ionization of the gas by X-radiation are incident and displaceable in the longitudinal direction within the chamber for producing a latent charge image thereon.
Claim 3
Dependent Claim
42 words
An X-ray exposure device as claimed in claim 1, wherein the central axis of the concentric potential distribution is situated on a center line in the longitudinal direction of the chamber, nearer to one of the shorter sides than to the other.
Claim 4
Dependent Claim
47 words
An X-ray exposure device as claimed in claim 2, wherein the electrode structures are annular, and the distance between the central axis of the electrode system and a shorter side of the chamber is at least half the dimension of the insulating foil in said longitudinal direction.
Claim 5
Dependent Claim
22 words
An X-ray exposure device as claimed in claim 1 wherein the chamber is rotatable about the central axis of the electrode system.
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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |