Patent US3874876A successfully refreshed from Google Patents.
US3874876A
Expired / Lapsed
US
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Polyethylene terephthalate film for use as support of X-ray film
Assignee: Fujifilm Holdings Corp
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Filing: 1973-04-13
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Granted: 1975-04-01
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Expires: 1993-04-13
Abstract
Abstract A polyethylene terephthalate film for use as a base of an X-ray film which contains at least one dye selected from the group consisting of 1-(2'',6''-dimethylanilino)-4,5,8trihydroxyanthraquinone, 1-(2'',4'',6''-trimethylanilino)-4,5,8trihydroxyanthraquinone, 1-(2'',6''-diethylanilino)-4,5,8trihydroxyanthraquinone and 1-(2''-methyl-6''-ethylanilino)-4,5,8trihydroxyanthraquinone. These dyes simultaneously meet the requirements of thermal stability, sublimation resistance, compatibility and good color, and are inert to X-ray silver halide emulsions and free from adverse effects on photographic properties such as sensitivity, gamma or fog.
Inventors
- 👤 Noburo Hibino
- 👤 Kunihira Seto
- 👤 Teruo Kobayashi
- 👤 Kazuo Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; G03C1/795; G03C1/7954
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
34 words
A POLYETHYLENE TEREPHTHALATE FILM FOR USE AS A SUPPORT OF A SILVER HALIDE X-RAY FILM COMPRISING POLYETHYLENE TEREPHTHALATE AND ONE OR MORE DYES SELECTED FROM THE GROUP CONSISTING OF 1-(2'',6''-DIMETHYLANILINO)-4,5,8-TRIHYDROXYANTHRAQUINONE, 1-(2'',4'',6''-TRIMETHYLANILINO)-4,5,8-TRIHYDROXYANTHRAQUINONE, 1-(2'',6''-DIETHYLANILINO)-4,5,8-TRIHYDROXYANTHRAQUINONE AND 1-(2''-METHYL-6''-ETHYLANILINO)-4,5,8-TRIHYDROXYANTHRAQUNIONE.
Claim 2
Dependent Claim
34 words
A POLYETHYLENE TEREPHTHALATE FILM FOR USE AS A SUPPORT OF A SILVER HALIDE X-RAY FILM COMPRISING POLYETHYLENE TEREPHTHALATE AND ONE OR MORE DYES SELECTED FROM THE GROUP CONSISTING OF 1-(2'',6''-DIMETHYLANILINO)-4,5,8-TRIHYDROXYANTHRAQUINONE, 1-(2'',4'',6''-TRIMETHYLANILINO)-4,5,8-TRIHYDROXYANTHRAQUINONE, 1-(2'',6''-DIETHYLANILINO)-4,5,8-TRIHYDROXYANTHRAQUINONE AND 1-(2''-METHYL-6''-ETHYLANILINO)-4,5,8-TRIHYDROXYANTHRAQUNIONE.
Claim 3
Dependent Claim
15 words
The film of claim 1 wherein one dye is present and the dye is 1-(2'',6''-dimethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 4
Dependent Claim
15 words
The film of claim 1 where one dye is present and the dye is 1-(2'',4'',6''-trimethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 5
Dependent Claim
15 words
The film of claim 1 where one dye is present and the dye is 1-(2'',6''-diethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 6
Dependent Claim
15 words
The film of claim 1 where one dye is present and the dye is 1-(2''-methyl-6''-ethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 7
Dependent Claim
12 words
The film of claim 1 where more than one dye is present.
Claim 8
Dependent Claim
28 words
The film of claim 1 wherein the one or more dyes are present in an amount of from 0.01 to 0.03 wt. percent, based on polyethylene terephthalate weight.
Claim 9
Dependent Claim
41 words
An X-ray film comprising an X-ray sensitIve silver halide photographic emulsion layer coated on one or both sides of a polyethylene terephthalate film which contains one or more days selected from the group consisting of 1-(2'',6''-dimethylanilino)-4,5,8-trihydroxyanthraquinone, 1-(2'',4'',6''-trimethylanilino)-4,5, 8-trihydroxyanthraquinone, 1-(2'',6''-diethylanilino)-4,5,8-trihydroxyanthraquinone and 1-(2''-methyl-6''-ethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 10
Dependent Claim
41 words
An X-ray film comprising an X-ray sensitIve silver halide photographic emulsion layer coated on one or both sides of a polyethylene terephthalate film which contains one or more days selected from the group consisting of 1-(2'',6''-dimethylanilino)-4,5,8-trihydroxyanthraquinone, 1-(2'',4'',6''-trimethylanilino)-4,5, 8-trihydroxyanthraquinone, 1-(2'',6''-diethylanilino)-4,5,8-trihydroxyanthraquinone and 1-(2''-methyl-6''-ethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 11
Dependent Claim
18 words
An X-ray film as claimed in claim 8 wherein one dye is present and the dye is 1-(2'',6''-dimethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 12
Dependent Claim
18 words
An X-ray film as claimed in claim 8 wherein one dye is present and the dye is 1-(2'',4'',6''-trimethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 13
Dependent Claim
18 words
An X-ray film as claimed in claim 8 wherein one dye is present and the dye is 1-(2'',6''-diethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 14
Dependent Claim
18 words
An X-ray film as claimed in claim 8 wherein one dye is present and the dye is 1-(2''-methyl-6''-ethylanilino)-4,5,8-trihydroxyanthraquinone.
Claim 15
Dependent Claim
31 words
An X-ray film as claimed in claim 8 wherein the one or more dyes are present in an amount of from 0.01 to 0.03 wt. percent, based on polyethylene terephthalate weight.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |