US4770979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer composition
Assignee: Konica Minolta Inc
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Filing: 1986-06-13
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Granted: 1988-09-13
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Expires: 2006-06-13
Abstract
Abstract The present invention provides a photographic developer composition comprising a plurality of developer components, including an alkali agent, that are packed in two or more separate receptacles. At least one of the developer components, except the alkali agent, is encapsulated in an alkali soluble polymer, and is held in at least one receptacle that does not substantially contain the alkali agent.
Inventors
- 👤 Shigeharu Koboshi
- 👤 Toshifumi Iijima
- 👤 Hiroshi Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:11
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/264; G03C5/265; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987; Y10T428/2989
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
A photographic developer comprising a plurality of developer components, including an alkali agent, said plurality of developer components being packed in two or more separate receptacles, wherein at least one of said developer components other than the alkali agent is encapsulated in an alkali soluble polymer and is held in at least one of said receptacles which does not substantially contain said alkali agent.
Claim 2
Dependent Claim
64 words
A photographic developer comprising a plurality of developer components, including an alkali agent, said plurality of developer components being packed in two or more separate receptacles, wherein at least one of said developer components other than the alkali agent is encapsulated in an alkali soluble polymer and is held in at least one of said receptacles which does not substantially contain said alkali agent.
Claim 3
Dependent Claim
46 words
A photographic developer composition according to claim 1, wherein the developer components except alkali agent is one selected from the group consisting of a color developing agent, a sulfite, a hydroxyl amine salt, a hydrogen peroxide, a hydrogen peroxide-releasing compound and a Co (III) complex salt.
Claim 4
Dependent Claim
47 words
A photographic developer according to claim 1, wherein the one receptacle which does not contain said alkali agent substantially is such that the receptacle contains the alkali agent in the amount less than one tenth of total amount of alkali agent comprised in said photographic developer composition.
Claim 5
Dependent Claim
24 words
A photographic developer composition according to claim 1, wherein the alkali soluble polymer is a polymer having a pendant carboxyl group or sulfo group.
Claim 6
Dependent Claim
60 words
A photographic developer comprising a plurality of developer components, including an alkali agent, said plurality of developer components being packed in two separate receptacles, wherein at least one of said developer components other than the alkali agent is encapsulated in an alkali soluble polymer and is held in one of said receptacles which does not substantially contain said alkali agent.
Claim 7
Dependent Claim
60 words
A photographic developer comprising a plurality of developer components, including an alkali agent, said plurality of developer components being packed in two separate receptacles, wherein at least one of said developer components other than the alkali agent is encapsulated in an alkali soluble polymer and is held in one of said receptacles which does not substantially contain said alkali agent.
Claim 8
Dependent Claim
59 words
A photographic developer comprising a plurality of developer components, including an alkali agent, said plurality of developer components being packed in two separate receptacles, wherein at least one of said developer components other than the alkali agent is encapsulated in an alkali soluble polymer and held in a receptable with at least one component other than the alkali agent.
Claim 9
Dependent Claim
59 words
A photographic developer comprising a plurality of developer components, including an alkali agent, said plurality of developer components being packed in two separate receptacles, wherein at least one of said developer components other than the alkali agent is encapsulated in an alkali soluble polymer and held in a receptable with at least one component other than the alkali agent.
Claim 10
Dependent Claim
21 words
The developer of claim 6, wherein the color developing agent is encapsulated and held in a receptacle containing a hydroxylamine salt.
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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |