Patent US4536779A successfully refreshed from Google Patents.
US4536779A
Expired / Lapsed
US
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Heat-sensitive recording material
Assignee: BASF Corp
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Filing: 1983-12-01
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Granted: 1985-08-20
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Expires: 2003-12-01
Abstract
Abstract A heat-sensitive recording material which comprises in its color reactant system, as developer for the color former, at least one aluminum or zinc salt of a phenolsulfonyl compound of the formula ##STR1## wherein R is C 1 -C 12 alkyl, cycloalkyl, phenyl, benzyl, or phenyl which is substituted by halogen, lower alkyl, lower alkoxy, nitro or methylenedioxy, and X is hydrogen, halogen, lower alkyl or lower alkoxy.
Inventors
- 👤 Hermann Nachbur
- 👤 Christel Tempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:00
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/333; B41M5/3333; B41M5/3335; B41M5/3336
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
67 words
A heat-sensitive recording material which comprises in its color reactant system, as developer for the color former, at least one aluminum or zinc salt of a phenolsulfonyl compound of the formula ##STR14## wherein R is C 1 -C 12 alkyl, cycloalkyl, phenyl, benzyl, or phenyl which is substituted by halogen, lower alkyl, lower alkoxy, nitro or methylenedioxy, and X is hydrogen, halogen, lower alkyl or lower alkoxy.
Claim 2
Dependent Claim
67 words
A heat-sensitive recording material which comprises in its color reactant system, as developer for the color former, at least one aluminum or zinc salt of a phenolsulfonyl compound of the formula ##STR14## wherein R is C 1 -C 12 alkyl, cycloalkyl, phenyl, benzyl, or phenyl which is substituted by halogen, lower alkyl, lower alkoxy, nitro or methylenedioxy, and X is hydrogen, halogen, lower alkyl or lower alkoxy.
Claim 3
Dependent Claim
32 words
A recording material of claim 1, wherein the developer is the aluminum or zinc salt of a phenolsulfonyl compound of the formula (1), wherein X is hydrogen, halogen, methyl, methoxy or ethoxy.
Claim 4
Dependent Claim
36 words
A recording material of claim 1, wherein the developer is the aluminum or zinc salt of a phenolsulfonyl compound of the formula (1), wherein R is phenyl or phenyl substituted by halogen, methyl, methoxy or ethoxy.
Claim 5
Dependent Claim
15 words
A recording material of claim 1, wherein the developer is the zinc salt of 4-hydroxydiphenylsulfone.
Claim 6
Dependent Claim
15 words
A recording material of claim 1, wherein the developer is the zinc salt of 4-hydroxy-4'-methyldiphenylsulfone.
Claim 7
Dependent Claim
15 words
A recording material of claim 1, wherein the developer is the aluminum salt of 4-hydroxydiphenylsulfone.
Claim 8
Dependent Claim
15 words
A recording material of claim 1, wherein the developer is the aluminum salt of 4-hydroxy-4'-methyldiphenylsulfone.
Claim 9
Dependent Claim
48 words
A recording material of claim 1, which comprises a base sheet, at least one color former, at least one developer and at least one binder in at least one recording layer, wherein the developer is the aluminum or zinc salt of the phenolsulfonyl compound of the formula (1).
Claim 10
Dependent Claim
17 words
A recording material of claim 8, wherein the developer is the zinc salt of 4-hydroxydiphenylsulfone or 4-hydroxy-4'-methyldiphenylsulfone.
Claim 11
Dependent Claim
17 words
A recording material of claim 8, wherein the developer is the aluminum salt of 4-hydroxydiphenylsulfone or 4-hydroxy-4'-methyldiphenylsulfone.
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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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |