US3235737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast response gamma-ray image converter
Assignee: Rauland Borg Corp
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Filing: 1961-08-01
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Granted: 1966-02-15
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Expires: 1981-08-01
Abstract
No abstract record available.
Inventors
- 👤 Wilfrid F Niklas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:20
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/385
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A GAMMA-RAY IMAGE CONVERTER COMPRISING, WITHIN AN EVACUATED ENVELOPE: A COMPOSITE PICK-UP SCREEN COMPRISING A HEAVY METAL TARGET ELEMENT RESPONSIVE TO INCIDENT GAMMA RAYS FOR DEVELOPING FREE ELECTRONS AT A PREDETERMINED ENERGY LEVEL, A SECONDARY EMISSION MULTIPLYING ELEMENT, OF A MATERIAL HAVING A SECONDARY EMISSION RATIO MULTIPLICATION FACTOR GREATER THAN UNITY WITHIN A RANGE OF INCIDENT ELECTRON ENERGY LEVELS BELOW SAID PREDETERMINED ENERGY LEVEL, IN JUXTAPOSITION WITH SAID TARGET ELEMENT FOR DEVELOPING SECONDARY ELECTRONS IN RESPONSE
Claim 2
Dependent Claim
76 words
A GAMMA-RAY IMAGE CONVERTER COMPRISING, WITHIN AN EVACUATED ENVELOPE: A COMPOSITE PICK-UP SCREEN COMPRISING A HEAVY METAL TARGET ELEMENT RESPONSIVE TO INCIDENT GAMMA RAYS FOR DEVELOPING FREE ELECTRONS AT A PREDETERMINED ENERGY LEVEL, A SECONDARY EMISSION MULTIPLYING ELEMENT, OF A MATERIAL HAVING A SECONDARY EMISSION RATIO MULTIPLICATION FACTOR GREATER THAN UNITY WITHIN A RANGE OF INCIDENT ELECTRON ENERGY LEVELS BELOW SAID PREDETERMINED ENERGY LEVEL, IN JUXTAPOSITION WITH SAID TARGET ELEMENT FOR DEVELOPING SECONDARY ELECTRONS IN RESPONSE
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |