Patent US4051303A successfully refreshed from Google Patents.
US4051303A
Expired / Lapsed
US
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Recording sheet
Assignee: Fujifilm Holdings Corp
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Filing: 1975-07-17
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Granted: 1977-09-27
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Expires: 1995-07-17
Abstract
Abstract A recording sheet comprising a support having thereon a color developer layer containing (1) a metal compound of an aromatic carboxylic acid and (2) at least one of gelatin or a gelatin derivative, the metal compound of an aromatic carboxylic acid being capable of forming a colored image when reacted with a color former.
Inventors
- 👤 Takao Hayashi
- 👤 Hajime Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:50
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
190 words
The process for forming a recording sheet comprising a support having thereon a color developer layer containing (1) a metal compound of an aromatic carboxylic acid which is the reaction product of an alkali metal salt of an aromatic carboxylic acid and a water soluble metal salt wherein the metal is selected from the group consisting of a metal of Group 1B of the Periodic Table, a metal of Group IIA, a metal of Group IIB, a metal of Group IIIB, a metal of Group IVA, a metal of Group VIA, a metal of Group VIIB or a metal of Group VIII and (2) at least one of gelatin or a gelatin derivative formed by reacting gelatin with an aromatic or aliphatic compound, said metal compound of an aromatic carboxylic acid being capable of forming a colored image when reacted with a color former, which process comprises: reacting said alkali metal salt of said aromatic carboxylic acid and said water-soluble metal salt in the presence of at least one of said gelatin or said gelatin derivative and thereafter coating the resulting product on said support to provide said recording sheet.
Claim 2
Dependent Claim
190 words
The process for forming a recording sheet comprising a support having thereon a color developer layer containing (1) a metal compound of an aromatic carboxylic acid which is the reaction product of an alkali metal salt of an aromatic carboxylic acid and a water soluble metal salt wherein the metal is selected from the group consisting of a metal of Group 1B of the Periodic Table, a metal of Group IIA, a metal of Group IIB, a metal of Group IIIB, a metal of Group IVA, a metal of Group VIA, a metal of Group VIIB or a metal of Group VIII and (2) at least one of gelatin or a gelatin derivative formed by reacting gelatin with an aromatic or aliphatic compound, said metal compound of an aromatic carboxylic acid being capable of forming a colored image when reacted with a color former, which process comprises: reacting said alkali metal salt of said aromatic carboxylic acid and said water-soluble metal salt in the presence of at least one of said gelatin or said gelatin derivative and thereafter coating the resulting product on said support to provide said recording sheet.
Claim 3
Dependent Claim
26 words
The process of claim 1, wherein said metal is copper, silver, magnesium, calcium, zinc, cadmium, mercury, aluminum, gallium, tin, lead, chromium, molybdenum, manganese, cobalt or nickel.
Claim 4
Dependent Claim
19 words
The process of claim 1, wherein said color developer layer contains a mixture of gelatin and a gelatin derivative.
Claim 5
Dependent Claim
30 words
The process of claim 1, wherein said metal compound of an aromatic carboxylic acid and at least one of said gelatin or said gelatin derivative is present in a binder.
Claim 6
Dependent Claim
20 words
The process of claim 1, wherein said gelatin and said gelatin derivative have a jelly strength of less than 150.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein said metal of said metal compound is selected from the group consisting of zinc, tin, aluminum and nickel.
Claim 8
Dependent Claim
18 words
The process of claim 1 wherein said metal is selected from the group consisting of magnesium and calcium.
Claim 9
Dependent Claim
100 words
The process of claim 1, wherein said aromatic carboxylic acid is represented by the formula: ##STR5## wherein R may be the same or different and represents a hydrogen atom, a hydroxy group, a halogen atom, a nitro group, an alkyl group having 1 to 10 carbon atoms, of which the total carbon atoms are less than 13, an aryl group, an arylamino group and an alicyclic group, m is an integer of 0 to 7 and n is an integer of 0 to 5, and the aromatic carboxylic acid may be dimerized through the substituent R as a methylene group.
Claim 10
Dependent Claim
27 words
The process of claim 8, wherein said aromatic carboxylic acid is represented by the formula: ##STR6## wherein R, m and n are as defined in claim 8.
Claim 11
Dependent Claim
43 words
The process of claim 8, wherein said aromatic carboxylic acid is represented by the formula: ##STR7## wherein R is as defined in claim 8, n is 1 or 2 and at least one R is in the meta-position relative to the hydroxy group.
Claim 12
Dependent Claim
44 words
The process of claim 8, wherein said gelatin or said gelatin derivative is used in an amount of from 10 to 100 parts by weight per 100 parts by weight of the aromatic carboxylic acid of said metal compound of an aromatic carboxylic acid.
Claim 13
Dependent Claim
27 words
The process of claim 11, wherein said gelatin derivative is the reaction product of gelatin with an acid anhydride or a compound having a reactive halogen atom.
Claim 14
Dependent Claim
21 words
The process of claim 12, wherein said acid anhydride is phthalic, benzoic, trimellitic, pyromellitic, sulfophthalic, maleic, succinic, or acetic acid anhydride.
Claim 15
Dependent Claim
47 words
The process of claim 12, wherein said compound having a reactive halogen atom is a sulfonylchloride group containing compound, a sulfonylfluoride group containing compound, an acyl chloride group containing compound, an acyl bromide containing compound, a compound having a free halogen atom, an isocyanate, or an N-allyl-N-vinylsulfonamide.
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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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |