Patent US4748106A successfully refreshed from Google Patents.
US4748106A
Expired / Lapsed
US
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Color photographic light-sensitive materials containing specified tabular grains
Assignee: Fujifilm Holdings Corp
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Filing: 1986-07-17
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Granted: 1988-05-31
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Expires: 2006-07-17
Abstract
Abstract A color photographic light-sensitive material comprising a support having thereon at least one layer each of a red-sensitive emulsion, a green-sensitive emulsion and a blue-sensitive emulsion, wherein at least 50% of the total projected area of silver halide grains contained in at least one of the emulsion layers is tabular grains of silver bromide, silver iodobromide, silver chlorobromide or silver iodochlorobromide which has a thickness of less than 0.12 micron, a diameter of less than 0.6 micron and a mean aspect ratio of at least 5. The color photographic light-sensitive material has an improved sharpness.
Inventors
- 👤 Yasuhiro Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:02
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3022; G03C1/00; G03C1/005; G03C1/0051; G03C1/06; G03C1/08; G03C1/09; G03C1/10; G03C1/12; G03C1/14; G03C1/18; G03C1/035; G03C2001/03594
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
A color photographic light-sensitive material comprising a support having thereon at least one layer each of a red-sensitive emulsion, a green-sensitive emulsion and a blue-sensitive emulsion, wherein at least 50% of the total projected area of silver halide grains in at least one of said emulsion layer is tabular grains of silver bromide or silver iodobromide which have a thickness of less than 0.12 micron and a diameter of less than 0.6 micron said tabular grains of silver bromide or silver iodobromide having a mean aspect ratio of at least 5.
Claim 2
Dependent Claim
91 words
A color photographic light-sensitive material comprising a support having thereon at least one layer each of a red-sensitive emulsion, a green-sensitive emulsion and a blue-sensitive emulsion, wherein at least 50% of the total projected area of silver halide grains in at least one of said emulsion layer is tabular grains of silver bromide or silver iodobromide which have a thickness of less than 0.12 micron and a diameter of less than 0.6 micron said tabular grains of silver bromide or silver iodobromide having a mean aspect ratio of at least 5.
Claim 3
Dependent Claim
29 words
A color photographic light-sensitive material of claim 1, wherein the total projected area of silver halide grains in at least one of said emulsion layers is at least 70%.
Claim 4
Dependent Claim
29 words
A color photographic light-sensitive material of claim 2, wherein the total projected area of silver halide grains in at least one of said emulsion layers is at least 90%.
Claim 5
Dependent Claim
23 words
A color photographic light-sensitive material of claim 1, wherein said emulsions are sensitized with gold, sulfur, or a combination of gold and sulfur.
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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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |