Patent US3918976A successfully refreshed from Google Patents.
US3918976A
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Polyester film with anthroquinone dye for a photographic film support
Assignee: Fujifilm Holdings Corp
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Filing: 1973-05-24
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Granted: 1975-11-11
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Expires: 1993-05-24
Abstract
Abstract WHEREIN X represents a hydrogen atom; an alkyl group having 1-15 carbon atoms; a cycloalkyl group; an aryl group; an aryl group substituted by an alkyl group having 1-10 carbon atoms, a carboxyl group, or a halogen atom; an aralkyl group; or an aralkyl group substituted by an alkyl group having 1-10 carbon atoms, a carboxyl group, or a halogen atom. A polyethylene terephthalate film for an X-ray photographic film support colored blue by one or more anthraquinone dyes represented by the general formula
Inventors
- 👤 Atsuaki Arai
- 👤 Masaki Okazaki
- 👤 Noburo Hibino
- 👤 Kunihira Seto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:03
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/325; C09B1/50; C09B1/51; C09B1/514; G03C1/795; G03C1/7954
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
A PHOTOGRAPHIC FILM HAVING A SUPPORT COMPRISING A POLYETHYLENE TEREPHTHALATE FILM CONTAINING AT LEAST ONE COMPOUND REPRESENRED BY THE FORMULA:
Claim 2
Dependent Claim
20 words
A PHOTOGRAPHIC FILM HAVING A SUPPORT COMPRISING A POLYETHYLENE TEREPHTHALATE FILM CONTAINING AT LEAST ONE COMPOUND REPRESENRED BY THE FORMULA:
Claim 3
Dependent Claim
38 words
A support as claimed in claim 1 wherein the cycloalkyl group has 5 or 6 carbon atoms, the aryl group is monaryl and the aralkyl group is monoaryl wherein the alkyl moiety has one or two carbon atoms.
Claim 4
Dependent Claim
35 words
A support as claimed in claim 1 wherein from about 0.01 to about 0.5 g of the at least one compound represented by the general formula is present per kilogram of the polyethylene terephthalate film.
Claim 5
Dependent Claim
35 words
A support as claimed in claim 3 wherein the polyethylene terephthalate has an intrinsic viscosity of from about 0.55 to about 0.70, determined in a 1:1 by weight mixture of phenol and tetrachloroethane at 25*C.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |