US3916200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window for radiation detectors and the like
Assignee: United States Department of Energy
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Filing: 1974-09-04
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Granted: 1975-10-28
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Expires: 1994-09-04
Abstract
Abstract An improved x- and gamma- radiation and particle transparent window for the environment-controlling enclosure of various types of radiation and particle detectors is provided by a special graphite foil of a thickness of from about 0.1 to 1 mil. The graphite must have very parallel hexagonal planes with a mosiac spread no greater than 5* to have the necessary strength in thin sections to support one atmosphere or more of pressure. Such graphite is formed by hot-pressing and annealing pyrolytically deposited graphite and thereafter stripping off layers of sufficient thickness to form the window.
Inventors
- 👤 Jr Cullie J Sparks
- 👤 Jack C Ogle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:39
CPC Classifications
G; G01; G01T; G01T7/00; H; H01; H01J; H01J5/00; H01J5/02; H01J5/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
31 words
IN AN IONIZING RADIATION DETECTOR INCLUDING A HOUSING HAVING A RADIATION PERVIOUS WINDOW THEREIN, THE IMPROVEMENT COMPRISING SAID WINDOW BEING A GRAPHITE FOIL FORMED FROM PYROLYTICALLY-DEPOSITED HOT PRESSED AND ANNEALED GRAPHITE.
Claim 2
Dependent Claim
31 words
IN AN IONIZING RADIATION DETECTOR INCLUDING A HOUSING HAVING A RADIATION PERVIOUS WINDOW THEREIN, THE IMPROVEMENT COMPRISING SAID WINDOW BEING A GRAPHITE FOIL FORMED FROM PYROLYTICALLY-DEPOSITED HOT PRESSED AND ANNEALED GRAPHITE.
Claim 3
Dependent Claim
49 words
The detector as set forth in claim 1 wherein said housing having an atmosphere therein at a pressure producing a pressure differential across said window of about 1 atmosphere and wherein said graphite foil window has a uniform thickness in the range of from about 0.1 to 1 mil.
References Cited (Backward Citations)
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US2552723A
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US2577106A
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |