Patent US3609093A successfully refreshed from Google Patents.
US3609093A
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Photochromic radiation dosimeter
Assignee: LARRY A HARRAH
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Filing: 1968-09-11
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Granted: 1971-09-28
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Expires: 1988-09-11
Abstract
Abstract A photochromic radiation dosimeter comprising a homogeneous mixture of a poly(halostyrene) host and a compound selected from the general structure of triarylmethane carbinols, ethers or azides substituted in one or more of the aryl moieties with hydroxyl or amine auxo-chromes.
Inventors
- 👤 Larry A Harrah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732; G01; G01T; G01T1/00; G01T1/02; G01T1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
26 words
The dosimeter of claim 1 wherein said host is selected from the group consisting of poly(3 chlorostyrene), poly(4 chlorostyrene), poly(4 bromostyrene), poly(4 iodostyrene) and poly(2,5 dichlorostyrene).
Claim 2
Dependent Claim
26 words
The dosimeter of claim 1 wherein said mixture includes a metal organic compound soluble in said host to vary the spectral sensitivity of said dye base.
Claim 3
Dependent Claim
23 words
The dosimeter of claim 3 wherein said metal organic compound is selected from the group consisting of tetraphenylstannane, copper acetylacetonate and triphenyl bismuth.
Claim 4
Dependent Claim
20 words
The dosimeter of claim 1 wherein said mixture includes a hydrocarbon selected from the group consisting of anthracene and phenanthrene.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |