Patent US5420000A successfully refreshed from Google Patents.
US5420000A
Expired / Lapsed
US
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Heat fixable high energy radiation imaging film
Assignee: JP Laboratories Inc
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Filing: 1993-08-12
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Granted: 1995-05-30
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Expires: 2013-08-12
Abstract
Abstract Described is a radiation sensitive imaging film containing a heat fixable radiation sensitive element, e.g., a diacetylene, of the formula: R--C.tbd.C--C.tbd.C--R', where R and R' are, e.g., both --CH 2 --O--CONH--(CH 2 ) 5 CH 3 . After exposure to X-radiation during diagnostic or X-ray therapy, the resulting image can be permanently dry fixed by a short heating step and then stored for a long period. Processes for making the film, new binder-convertor systems, and a device incorporating the film are described as well as other imaging, diagnostic and therapeutic methods utilizing the film in high energy radiation applications in the health care field.
Inventors
- 👤 Gordhanbhai N. Patel
- 👤 Yao-Ming Cheng
- 👤 Subhash H. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:46
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16; G03C1/00; G03C1/72; G03C1/73; G03F; G03F7/00; G03F7/004; G03F7/025
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
118 words
A self-developing film for developing an image from exposure to X-ray, gamma ray, or electron, radiation comprising at least one conjugated diacetylene, or cocrystallized mixture thereof, capable of undergoing a color change upon polymerization when contacted with ultraviolet light, X-rays, alpha particles, or electrons, thereby forming an image; a binder; a convertor, wherein said convertor is a material which can emit lower energy radiation for polymerization of said diacetylene after contact with X-radiation, gamma radiation or electrons; wherein said image is capable of being fixed by heating said diacetylene at or above its melting point, or at the temperature at which the diacetylene undergoes a phase change to a radiation inactive phase, and wherein said film is transparent.
Claim 2
Dependent Claim
118 words
A self-developing film for developing an image from exposure to X-ray, gamma ray, or electron, radiation comprising at least one conjugated diacetylene, or cocrystallized mixture thereof, capable of undergoing a color change upon polymerization when contacted with ultraviolet light, X-rays, alpha particles, or electrons, thereby forming an image; a binder; a convertor, wherein said convertor is a material which can emit lower energy radiation for polymerization of said diacetylene after contact with X-radiation, gamma radiation or electrons; wherein said image is capable of being fixed by heating said diacetylene at or above its melting point, or at the temperature at which the diacetylene undergoes a phase change to a radiation inactive phase, and wherein said film is transparent.
Claim 3
Dependent Claim
157 words
The film of claim I further comprising: (a) at least one layer containing said at least one conjugated diacetylene, or cocrystallized mixture thereof, capable of undergoing a color change upon polymerization induced by ultraviolet light, X-rays, alpha particles, or electrons, thereby forming a colored image; (b) at least one layer containing said binder and said convertor being in combination, being a complex or solid solution, wherein said convertor is a material capable of emitting ultraviolet light, low energy X-rays, alpha particles, or electrons upon contact with higher energy X-ray, gamma ray, electron, radiation; (c) a substrate upon which said layers (a) and (b) are deposited thereon, wherein layer (a) and layer (b) are capable of being combined into one layer (ab), and said colored image is capable of being fixed by heating said diacetylene at or above its melting point, or at the temperature at which the diacetylene undergoes a phase change to a radiation inactive phase.
Claim 4
Dependent Claim
30 words
The film of claim 1 wherein said diacetylene is selected from the group consisting of: 2,4-hexadiyn-1,6-bis (n-hexylurethane); 2,4-hexadiyn-1,6-bis (n-pentylurethane); 2,4-hexadiyn-1-mono (n-pentyl-urethane)-6-mono (n-hexylurethane); 2,4-hexadiyn-1-mono (n-hexyl-urethane)-6-mono (phenyl acetate); and co-crystallized mixtures thereof.
Claim 5
Dependent Claim
19 words
The film of claim 3 wherein said diacetylene is a co-crystallized mixture of 2,4-hexadiyn-1,6-bis (n-hexylurethane) and 2,4-hexadiyn-1-mono (n-pentyl-urethane)-6-mono (n-hexylurethane).
Claim 6
Dependent Claim
25 words
The film of claim 4 wherein said 2,4-hexadiyn-1,6-bis (n-hexylurethane) is present in the co-crystallized mixture in an amount of about 80 weight percent or above.
Claim 7
Dependent Claim
12 words
The film of claim 3 wherein said diacetylene turns red upon irradiation.
Claim 8
Dependent Claim
20 words
The film of claim 6 wherein said diacetylene after irradiation turns blue by heating at or above its melting point.
Claim 9
Dependent Claim
26 words
The film of claim 1 wherein said convertor is selected from the group consisting of an element, alloy, salt, of mixture thereof of barium or lead.
Claim 10
Dependent Claim
23 words
The film of claim 1 wherein the convertor is a metallic moiety covalently or ionically bonded to at least one of said diacetylenes.
Claim 11
Dependent Claim
35 words
The film of claim 1 wherein the convertor is a radio/electron luminescence or fluorescence phosphor which emits UV light, or lower energy X-ray or electrons when contacted with high energy X-rays, gamma rays, or electrons.
Claim 12
Dependent Claim
23 words
The film of claim I wherein the convertor is a metallic moiety intermixed with said binder in a complex or solid solution combination.
Claim 13
Dependent Claim
55 words
The film of claim I wherein said convertor is selected from salts, alloys, or mixtures of: Cr, Mn, Fe, Co, Ni, Zr, Ru, In, Sb, W, Bi, U, La, Cr, Zn, Mo, Ba, Pd, Ag, Cu, Pt, Pb, Au, Hg, Ti, Cd, K, Mg, Na, Sn, Cs, l; phosphors; fluorescent compounds; or cathode luminescent compounds.
Claim 14
Dependent Claim
76 words
The film of claim 9 wherein said convertor is selected from the group consisting of Bal 2 , BaSO 4 , BaBr 2 , BaCl 2 , Pbl 2 , MgCl 2 , Kl, KBr, Nal, Na 3 PO 4 , Snl 4 , H 2 WO 4 , ZnO, ZnBr 2 , Znl 2 , ZnSO 4 , CsBr, Csl, ZnS, ZnCl 2 , Y 2 O 2 S, CaWO 3 and ZnSiO 4 .
Claim 15
Dependent Claim
19 words
The film of claim 1 wherein said convertor emits a lower energy radiation of 4 e V or above.
Claim 16
Dependent Claim
18 words
The film of claim 1 wherein said convertor is selected from lead iodide, barium iodide, or mixtures thereof.
Claim 17
Dependent Claim
15 words
The film of claim 1 wherein said binder is a water soluble or water-insoluble polymer.
Claim 18
Dependent Claim
26 words
The film of claim 9 wherein said binder is a water soluble binder selected from the group consisting of: polyacids, polyamines, polyethers, polyalcohols, polyamides, and gelatin.
Claim 19
Dependent Claim
25 words
The film of claim 17 wherein said binder is selected from the group consisting of polyacrylic acid, polyvinylalcohol, polyvinylpyridine, polyvinylpyrrolidone, polyethyleneimine, polyethyleneoxide, polyvinylether, and gelatin.
Claim 20
Dependent Claim
10 words
The film of claim 18 wherein said binder is polyethyleneimine.
Claim 21
Dependent Claim
14 words
The film of claim 1 wherein said binder forms a complex with said convertor.
Claim 22
Dependent Claim
11 words
The film of claim 1 further comprising (c) an undercoat layer.
Claim 23
Dependent Claim
35 words
The film of claim 1 wherein said diacetylene is a co-crystallized mixture of 2,4-hexadiyn-1,6-bis (n-hexylurethane) and 2,4-hexadiyn-1-mono (n-pentylurethane)-6-mono (n-hexylurethane)in an 85:15 weight ratio, respectively, said binder is polyethyleneimine complexed with the convertors and barium iodide.
Claim 24
Dependent Claim
13 words
The film of claim 1 wherein said diacetylene is in radiation active form.
Claim 25
Dependent Claim
28 words
The film of claim 1 wherein said diacetylene is in a radiation inactive form but is capable of being converted to the radiation active form prior to use.
Claim 26
Dependent Claim
26 words
A film of claim 1 wherein said resulting image can be further amplified or darkened by contacting with a dye which bonds with the polymerized diacetylene.
Claim 27
Dependent Claim
85 words
A self-developing film for developing an image from exposure to ultraviolet laser radiation comprising at least one conjugated diacetylene, or cocrystallized mixture thereof, capable of undergoing a color change upon polymerization when contacted with ultraviolet laser radiation thereby forming an image, and a polyethyleneimine binder complex, forming a transparent film, wherein said image is capable of being fixed by heating said diacetylene at or above its melting point, or at the temperature at which the diacetylene undergoes a phase change to a radiation inactive phase.
Claim 28
Dependent Claim
85 words
A self-developing film for developing an image from exposure to ultraviolet laser radiation comprising at least one conjugated diacetylene, or cocrystallized mixture thereof, capable of undergoing a color change upon polymerization when contacted with ultraviolet laser radiation thereby forming an image, and a polyethyleneimine binder complex, forming a transparent film, wherein said image is capable of being fixed by heating said diacetylene at or above its melting point, or at the temperature at which the diacetylene undergoes a phase change to a radiation inactive phase.
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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) | 1998-05-29 | 1998-11-28 | 1999-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-29 | 2002-11-28 | 2003-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-29 | 2006-11-28 | 2007-05-30 | $7700.00 | Window Closed / Lapsed |