Patent US4017738A successfully refreshed from Google Patents.
US4017738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scintillator
Assignee: Individual
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Filing: 1975-06-17
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Granted: 1977-04-12
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Expires: 1995-06-17
Abstract
Abstract A new scintillator, di-m-methylphenyl-1,3,4-oxadiazole, or 2,5-di-m-tolyl-1,3,4-oxadiazole, is prepared by reacting m-toluoyl chloride with hydrazine to form di-m-toluoyl hydrazine which, in turn, is reacted with thionyl chloride to form the desired product. The scintillator, di-m-methylphenyloxadiazole compares favorably with present commercial products, being equal to or better than diphenyloxazole in most important respects and significantly superior in scintillation pulse height and in stability. It can be produced at a fraction of the cost of today's most widely used product.
Inventors
- 👤 Mark Hyman, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:08
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/203; C; C09; C09K; C09K11/00; C09K11/06; G01T1/204; G01T1/2042
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
33 words
A method of detecting and measuring emission of high energy particles comprising exposing to high energy particles a measured solution containing 2,5-di-m-tolyl-1,3,4 oxadiazole and measuring the emission of radiation from the 2,5-di-m-tolyl-1,3,4 oxadiazole.
Claim 2
Independent Claim
33 words
A method of detecting and measuring emission of high energy particles comprising exposing to high energy particles a measured solution containing 2,5-di-m-tolyl-1,3,4 oxadiazole and measuring the emission of radiation from the 2,5-di-m-tolyl-1,3,4 oxadiazole.
Claim 3
Dependent Claim
13 words
The method of claim 1, wherein the high energy particle emission is radioactivity.
Claim 4
Dependent Claim
16 words
The method of claim 2, wherein a secondary fluor is employed in conjunction with 2,5-di-m-tolyl-1,3,4 oxadiazole.
Claim 5
Dependent Claim
13 words
The method of claim 3, wherein the secondary fluor is 2,2'-p-phenylene bis- (5-phenyloxazole).
Claim 6
Independent Claim
33 words
A method of measuring radioactive emission by scintillation counting comprising dispersing in mixed dispersion a material containing at least one radioactive compound and, as a scintillator 2,5-di-m-tolyl-1,3,4 oxadiazole and counting resulting scintillation pulses.
Claim 7
Independent Claim
33 words
A method of measuring radioactive emission by scintillation counting comprising dispersing in mixed dispersion a material containing at least one radioactive compound and, as a scintillator 2,5-di-m-tolyl-1,3,4 oxadiazole and counting resulting scintillation pulses.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |