Patent US4219219A successfully refreshed from Google Patents.
US4219219A
Expired / Lapsed
US
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Developers for pressure-sensitive recording and developing sheets containing them
Assignee: Fujifilm Holdings Corp
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Filing: 1979-03-05
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Granted: 1980-08-26
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Expires: 1999-03-05
Abstract
Abstract In a pressure sensitive recording sheet comprising a layer of microcapsules containing a color former and a color developer, said layer of microcapsules and said color developer being on the same or independent supports, the improvement which comprises said developer being a polyvalent metal salt of a substituted salicylic acid represented by the general formulae (I) or (II): ##STR1## wherein R represents a hydrogen atom, an alkyl group, an aralkyl group or an aryl group, R 1 represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group and Ar and Ar' which may be the same or different each represents an aryl group.
Inventors
- 👤 Kozo Sato
- 👤 Hajime Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:44
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/01; C07C65/105; B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; C07C37/00; C07C37/11; C07C37/14; C07C37/16; C07C51/00; C07C51/02; C07C51/06; C07C51/15; C07C51/347; C07C51/353; C07C51/41; C07C51/412; Y; Y10; Y10S; Y10S428/00; Y10S428/914
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
In a pressure-sensitive recording material comprising a support having coated thereon a developer and a layer of microcapsules containing a color former coated on the same or an independent support, the improvement which comprises: said developer being a polyvalent metal salt of a substituted salicylic acid represented by the following general formula (I) or (II) ##STR3## wherein R represents a hydrogen atom, an alkyl group, an aralkyl group or an aryl group, R 1 represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group, and Ar and Ar' which may be the same or different each represents an aryl group.
Claim 2
Dependent Claim
104 words
In a pressure-sensitive recording material comprising a support having coated thereon a developer and a layer of microcapsules containing a color former coated on the same or an independent support, the improvement which comprises: said developer being a polyvalent metal salt of a substituted salicylic acid represented by the following general formula (I) or (II) ##STR3## wherein R represents a hydrogen atom, an alkyl group, an aralkyl group or an aryl group, R 1 represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group, and Ar and Ar' which may be the same or different each represents an aryl group.
Claim 3
Dependent Claim
60 words
The pressure-sensitive recording material of claim 1, wherein said developer additionally comprises one or more of an oxide, hydroxide, carbonate or carboxylic acid salt of zinc, aluminum, titanium, boron, silicon, magnesium or calcium, as an essential ingredient, where said carboxylic acid salt is other than a substituted salicylic acid represented by the general formula (I) or (II) of claim 1.
Claim 4
Dependent Claim
103 words
The pressure-sensitive material of claims 1 or 2, wherein R represents a hydrogen atom, a straight chain or branched chain alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an aralkyl group having 7 to 9 carbon atoms, or an aryl group having 6 to 10 carbon atoms; R 1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 10 carbon atoms, and Ar and Ar', which may be the same or different, each represents an aryl group having 6 to 18 carbon atoms.
Claim 5
Dependent Claim
75 words
The pressure-sensitive material of claims 1 or 2, wherein R represents a hydrogen atom, a methyl group, a cyclohexyl group, or a phenyl group; R 1 represents an alkyl group having 1 to 4 carbon atoms, a phenyl group or an alkyl substituted phenyl group having 7 to 10 carbon atoms, and Ar and Ar', which may be the same or different, each represents an alkyl substituted phenyl group having 7 to 10 carbon atoms.
Claim 6
Dependent Claim
51 words
The pressure-sensitive material of claims 1 or 2, wherein said polyvalent metal of said salt of said substituted salicylic acid represented by the general formula (I) or (II) is a metal selected from the group consisting of magnesium, calcium, aluminum, tin, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc.
Claim 7
Dependent Claim
14 words
The pressure-sensitive material of claim 5, wherein said polyvalent metal is zinc or aluminum.
Claim 8
Dependent Claim
32 words
The pressure-sensitive material of claim 2, wherein said metal oxide, hydroxide, carbonate or carboxylic acid salt is selected from the group consisting of zinc oxide, aluminum hydroxide, silicon dioxide and aluminum silicate.
Claim 9
Dependent Claim
48 words
The pressure-sensitive material of claim 2, wherein said oxide, hydroxide, carbonate or carboxylic acid is present in an amount of about 0.1 to about 100 parts by weight per part by weight of said salt of a substituted salicylic acid represented by the general formula (I) or (II).
Claim 10
Dependent Claim
29 words
The pressure-sensitive recording material of claim 1 or 2, wherein said color former is selected from the group consisting of Crystal Violet Lactone, Rhodamine B Lactam, dibenzylamino-7-diethylaminofluoran and 2-methyl-3-anilino-7-diethylaminofluoran.
References Cited (Backward Citations)
US3864146A
Cited
US3924027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |