Patent US4680598A successfully refreshed from Google Patents.
US4680598A
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US
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Chromogenic materials employing fluoran compounds
Assignee: Nippon Soda Co Ltd
•
Filing: 1986-04-08
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Granted: 1987-07-14
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Expires: 2006-04-08
Abstract
Abstract The fluoran compounds of the formula (I) are new red color forming chromogenic dyes. <IMAGE> (I) wherein R represents an isobutyl or isopentyl group, R1 represents a hydrogen or halogen atom or an alkyl group, R2 represents a hydrogen or halogen atom or an alkyl group, R3 represents a hydrogen atom, and R4 represents a hydrogen atom, or R4 and R1 as well as R2 and R3 taken together with the carbon atoms to which they are attached may form a benzene ring which may be substituted with a halogen atom. They are used, together with an acidic developer, in chromogenic recording materials for use in pressure sensitive copying paper, heat-sensitive recording paper and thermo-sensitive, reversible color changing composition.
Inventors
- 👤 Takeo Obitsu
- 👤 Tetsuo Igaki
- 👤 Kimiaki Kinoshita
- 👤 Morio Nanbu
- 👤 Shinichi Satoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:45
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/24; B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/145; B41M5/1455; B41M5/26; B41M5/30; B41M5/323; B41M5/327; B41M5/3275; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
114 words
A chromogenic recording material which comprises a substrate, a fluoran compound of the formula ##STR21## wherein R is an isobutyl or isopentyl group, R 1 is hydrogen, a halogen atom or an alkyl group, R 2 is hydrogen, a halogen atom or an alkyl group, R 3 is hydrogen, and R 4 is hydrogen, or R 4 and R 1 as well as R 2 and R 3 , when taken together with the carbon atoms to which they are attached, form a substituted or unsubstituted benzene ring wherein the substituent is a halogen atom, as a color forming component, and a color developer capable of causing the color formation of the fluoran compound.
Claim 2
Dependent Claim
114 words
A chromogenic recording material which comprises a substrate, a fluoran compound of the formula ##STR21## wherein R is an isobutyl or isopentyl group, R 1 is hydrogen, a halogen atom or an alkyl group, R 2 is hydrogen, a halogen atom or an alkyl group, R 3 is hydrogen, and R 4 is hydrogen, or R 4 and R 1 as well as R 2 and R 3 , when taken together with the carbon atoms to which they are attached, form a substituted or unsubstituted benzene ring wherein the substituent is a halogen atom, as a color forming component, and a color developer capable of causing the color formation of the fluoran compound.
Claim 3
Dependent Claim
21 words
The chromogenic recording material of claim 1 wherein the color forming component is selected from 3-N-isobutyl-ethylamino-6-methyl-7-chlorofluoran, 3-N-isobutyl-ethylamino-7-chlorofluoran, 3-N-isobutylethylamino-7,8-benzofluoran, 3-N-isopentyl-ethylamino-6-methyl-7-chlorofluoran or 3-N-isopentyl-ethylamino-6-chlorofluoran.
Claim 4
Dependent Claim
25 words
The chromogenic recording material of claim 2 which firther comprises as a color forming component at least one of black color forming chromogenic fluoran compounds.
Claim 5
Dependent Claim
12 words
The chromogenic recording material of claim 3 which is heat-sensitive recording papers.
Claim 6
Dependent Claim
12 words
The chromogenic recording material of claim 3 which is pressure-sensitive recording papers.
Claim 7
Dependent Claim
13 words
The chromogenic recording material of claim 3 which is heat-transfer chromogenic recording papers.
Claim 8
Dependent Claim
13 words
The chromogenic recording material of claim 8 which is heat-transfer chromogenic recording papers.
Claim 9
Dependent Claim
32 words
The chromogenic recording material of claim 2 which further comprises as a color forming component at least one of a green color forming chromogenic compound and a blue color forming chromogenic compound.
Claim 10
Dependent Claim
12 words
The chromogenic recording material of claim 8 which is heat-sensitive recording papers.
Claim 11
Dependent Claim
12 words
The chromogenic recording material of claim 8 which is pressure-sensitive recording papers.
Claim 12
Dependent Claim
12 words
The chromogenic recording material of claim 2 which is heat-sensitive recording papers.
Claim 13
Dependent Claim
12 words
The chromogenic recording material of claim 2 which is pressure-sensitive recording papers.
Claim 14
Dependent Claim
13 words
The chromogenic recording material of claim 2 which is heat-transfer chromogenic recording papers.
Claim 15
Dependent Claim
23 words
The chromogenic recording material of claim 1 wherein the color developer is selected from bisphenol compounds, 4-hydroxybenzoic acid esters, hydroxysulfones or 4-hydroxyphthalic acids.
Claim 16
Dependent Claim
25 words
The chromogenic recording material of claim 14 which further comprises as a color forming component at least one of black color forming chromogenic fluoran compounds.
Claim 17
Dependent Claim
12 words
The chromogenic recording material of claim 15 which is heat-sensitive recording papers.
Claim 18
Dependent Claim
12 words
The chromogenic recording material of claim 15 which is pressure-sensitive recording papers.
Claim 19
Dependent Claim
13 words
The chromogenic recording material of claim 15 which is heat-transfer chromogenic recording papers.
Claim 20
Dependent Claim
32 words
The chromogenic recording material of claim 14 which further comprises as a color forming component at least one of a green color forming chromogenic compound and a blue color forming chromogenic compound.
Claim 21
Dependent Claim
12 words
The chromogenic recording material of claim 19 which is heat-sensitive recording papers.
Claim 22
Dependent Claim
12 words
The chromogenic recording material of claim 19 which is pressure-sensitive recording papers.
Claim 23
Dependent Claim
13 words
The chromogenic recording material of claim 19 which is heat-transfer chromogenic recording papers.
Claim 24
Dependent Claim
12 words
The chromogenic recording material of claim 14 which is heat-sensitive recording papers.
Claim 25
Dependent Claim
13 words
The chromogenic recording material of claim 14 which is heat-transfer chromogenic recording papers.
Claim 26
Dependent Claim
54 words
The chromogenic recording material of claim 1 wherein the color developer is selected from inorganic acid substances, aliphatic carboxylic acids, aromatic carboxylic acids, metal salts of aromatic carboxylic acids, phenol resin type developers (such as p-phenylphenol-formalin resin and p-butyl-phenol-acetylene resin), or mixtures of phenol resin type developers and metal salts of aromatic carboxylic acids.
Claim 27
Dependent Claim
25 words
The chromogenic recording material of claim 25 which further comprises as a color forming component at least one of black color forming chromogenic fluoran compounds.
Claim 28
Dependent Claim
12 words
The chromogenic recording material of claim 26 which is heat-sensitive recording papers.
Claim 29
Dependent Claim
12 words
The chromogenic recording material of claim 26 which is pressure-sensitive recording papers.
Claim 30
Dependent Claim
13 words
The chromogenic recording material of claim 26 which is heat-transfer chromogenic recording papers.
Claim 31
Dependent Claim
12 words
The chromogenic recording material of claim 25 which is pressure-sensitive recording papers.
Claim 32
Dependent Claim
32 words
The chromogenic recording material of claim 25 which further comprises as a color forming component at least one of a green color forming chromogenic compound and a blue color forming chromogenic compound.
Claim 33
Dependent Claim
12 words
The chromogenic recording material of claim 31 which is heat-sensitive recording papers.
Claim 34
Dependent Claim
12 words
The chromogenic recording material of claim 31 which is pressure-sensitive recording papers.
Claim 35
Dependent Claim
13 words
The chromogenic recording material of claim 31 which is heat-transfer chromogenic recording papers.
Claim 36
Dependent Claim
13 words
The chromogenic recording material of claim 25 which is heat-transfer chromogenic recording papers.
Claim 37
Dependent Claim
24 words
The chromogenic recording material of claim 1 wherein the substrate is selected from the paper synthetic fiber fabric, synthetic paper or synthetic resin sheet.
Claim 38
Dependent Claim
25 words
The chromogenic recording material of claim 36 which further comprises as a color forming component at least one of black color forming chromogenic fluoran compounds.
Claim 39
Dependent Claim
12 words
The chromogenic recording material of claim 37 which is heat-sensitive recording papers.
Claim 40
Dependent Claim
12 words
The chromogenic recording material of claim 37 which is pressure-sensitive recording papers.
Claim 41
Dependent Claim
13 words
The chromogenic recording material of claim 37 which is heat-transfer chromogenic recording papers.
Claim 42
Dependent Claim
12 words
The chromogenic recording material of claim 36 which is heat-sensitive recording papers.
Claim 43
Dependent Claim
12 words
The chromogenic recording material of claim 36 which is pressure-sensitive recording papers.
Claim 44
Dependent Claim
31 words
The chromogenic recording material of claim 36 which further comprises as a color forming component at least one of a green color chromogenic compound and a blue color forming chromogenic compound.
Claim 45
Dependent Claim
12 words
The chromogenic recording material of claim 43 which is heat-sensitive recording papers.
Claim 46
Dependent Claim
12 words
The chromogenic recording material of claim 43 which is pressure-sensitive recording papers.
Claim 47
Dependent Claim
13 words
The chromogenic recording material of claim 43 which is heat-transfer chromogenic recording papers.
Claim 48
Dependent Claim
13 words
The chromogenic recording material of claim 36 which is heat-transfer chromogenic recording papers.
Claim 49
Dependent Claim
26 words
The chromogenic reading material of claim 1 which further comprises as a color forming component at least one of the black color forming chromogenic fluoran compounds.
Claim 50
Dependent Claim
12 words
The chromogenic recording material of claim 48 which is heat-sensitive recording papers.
Claim 51
Dependent Claim
12 words
The chromogenic recording material of claim 48 which is pressure-sensitive recording papers.
Claim 52
Dependent Claim
13 words
The chromogenic recording material of claim 48 which is heat-transfer chromogenic recording papers.
Claim 53
Dependent Claim
25 words
The chromogenic recording material of claim 1 which further comprises as a color forming component at least one of a green color forming chromogenic compound.
Claim 54
Dependent Claim
12 words
The chromogenic recording material of claim 52 which is heat-sensitive recording papers.
Claim 55
Dependent Claim
12 words
The chromogenic recording material of claim 52 which is pressure-sensitive recording papers.
Claim 56
Dependent Claim
13 words
The chromogenic recording material of claim 52 which is heat-transfer chromogenic recording papers.
Claim 57
Dependent Claim
12 words
The chromogenic recording material of claim 1 which is heat-sensitive recording papers.
Claim 58
Dependent Claim
12 words
The chromogenic recording material of claim 1 which is pressure-sensitive recording papers.
Claim 59
Dependent Claim
13 words
The chromogenic recording material of claim 1 which is heat-transfer chromogenic recording papers.
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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |