US4372583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromogenic copy system and method
Assignee: Individual
•
Filing: 1981-08-17
•
Granted: 1983-02-08
•
Expires: 2001-08-17
Abstract
Abstract A pressure-sensitive chromogenic copy system utilizing a color developer capable of reacting with a chromogen to form a color image, said color developer comprising an oligomeric aromatic carboxylic acid and the method of making such oligomer by reaction of the acid with an aldehyde under alkaline conditions.
Inventors
- 👤 Anthony E. Vassiliades
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:19
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
67 words
A pressure-sensitive chromogenic copy system comprising a transfer sheet having on at least a portion of at least one surface thereof a color developer capable of reacting with a chromogen to form a color image, said color developer comprising an oligomeric aromatic carboxylic acid or metallic salt thereof and said oligomer is formed by reacting an aromatic carboxylic acid with an aldehyde at a pH above 7.
Claim 2
Dependent Claim
67 words
A pressure-sensitive chromogenic copy system comprising a transfer sheet having on at least a portion of at least one surface thereof a color developer capable of reacting with a chromogen to form a color image, said color developer comprising an oligomeric aromatic carboxylic acid or metallic salt thereof and said oligomer is formed by reacting an aromatic carboxylic acid with an aldehyde at a pH above 7.
Claim 3
Dependent Claim
20 words
The pressure-sensitive chromogenic copy system of claim 1 wherein the aromatic carboxylic acid is an unsubstituted or substituted salicylic acid.
Claim 4
Dependent Claim
40 words
The pressure-sensitive chromogenic copy system of claim 2 wherein the unsubstituted or substituted salicylic acid is selected from salicylic acid, acetyl salicylic acid, or a mono- or di-C 4 -C 8 alkyl substituted salicylic acid and the aldehyde is formaldehyde.
Claim 5
Dependent Claim
42 words
The pressure-sensitive chromogenic copy system of claim 3 wherein the unsubstituted or substituted salicylic acid is a substituted salicylic acid selected from 3,5 di-tertiary butyl salicylic acid, 3-tertiary butyl salicylic acid, 5-tertiary butyl salicylic acid, 3-octyl salicylic acid, or 5-octyl salicylic acid.
Claim 6
Dependent Claim
22 words
The pressure-sensitive chromogenic copy system of claims 2, 3, or 4 wherein the substituted salicylic acid is 3,5 di-tertiary butyl salicylic acid.
Claim 7
Dependent Claim
67 words
A receptor sheet for a pressure-sensitive chromogenic copy system comprising a substrate having on at least a portion of one surface thereof a color developer capable of reacting with a chromogen to form color images, said color developer comprising an oligomeric aromatic carboxylic acid or metallic salt thereof and said oligomer is formed by reacting an aromatic carboxylic acid with an aldehyde at a pH above 7.
Claim 8
Dependent Claim
67 words
A receptor sheet for a pressure-sensitive chromogenic copy system comprising a substrate having on at least a portion of one surface thereof a color developer capable of reacting with a chromogen to form color images, said color developer comprising an oligomeric aromatic carboxylic acid or metallic salt thereof and said oligomer is formed by reacting an aromatic carboxylic acid with an aldehyde at a pH above 7.
Claim 9
Dependent Claim
25 words
The receptor sheet of claim 6 wherein the color developer is an oligomer formed by reacting an unsubstituted or substituted salicylic acid with an aldehyde.
Claim 10
Dependent Claim
38 words
The receptor sheet of claim 7 wherein the substituted or unsubstituted salicylic acid is selected from salicylic acid, acetyl salicylic acid, or a mono- or di-C 1 -C 8 alkyl substituted salicylic acid and the aldehyde is formaldehyde.
Claim 11
Dependent Claim
21 words
The receptor sheet of claims 7 or 8 wherein the unsubstituted or substituted salicylic acid is 3,5 di-tertiary butyl salicylic acid.
Claim 12
Dependent Claim
89 words
A coated front and back sheet for a pressure-sensitive chromogenic copy system comprising a substrate having on at least a portion of one surface thereof a coating of chromogen-containing microcapsules and on at least a portion of the other surface thereof a coating of a color developer capable of reacting with said chromogen to form color images, said color developer comprising an oligomeric aromatic carboxylic acid or metallic salt thereof and said oligomer is formed by reacting an aromatic carboxylic acid with an aldehyde at a pH above 7.
Claim 13
Dependent Claim
89 words
A coated front and back sheet for a pressure-sensitive chromogenic copy system comprising a substrate having on at least a portion of one surface thereof a coating of chromogen-containing microcapsules and on at least a portion of the other surface thereof a coating of a color developer capable of reacting with said chromogen to form color images, said color developer comprising an oligomeric aromatic carboxylic acid or metallic salt thereof and said oligomer is formed by reacting an aromatic carboxylic acid with an aldehyde at a pH above 7.
Claim 14
Dependent Claim
21 words
The coated front and back sheet of claim 10 wherein the aromatic carboxylic acid is an unsubstituted or substituted salicylic acid.
Claim 15
Dependent Claim
41 words
The coated front and back sheet of claim 11 wherein the unsubstituted or substituted salicylic acid is selected from salicylic acid, acetyl salicylic acid, or a mono- or di-C 1 -C 8 alkyl substituted salicylic acid and the aldehyde is formaldehyde.
Claim 16
Dependent Claim
21 words
The receptor sheet of claims 11 or 12 wherein the unsubstituted or substituted salicylic acid is 3,5 di-tertiary butyl salicylic acid.
Claim 17
Independent Claim
74 words
The method of making an oligomeric aromatic carboxylic acid or metallic salt thereof suitable for use as a color developer capable of reacting with a chromogen to form a color image comprising reacting an aldehyde with an aromatic carboxylic acid in a molar ratio of from 3:1 to 0.1:1 at a pH above 7 and at a temperature below about 100° C. for a period not exceeding three hours and recovering the resultant oligomer.
Claim 18
Independent Claim
74 words
The method of making an oligomeric aromatic carboxylic acid or metallic salt thereof suitable for use as a color developer capable of reacting with a chromogen to form a color image comprising reacting an aldehyde with an aromatic carboxylic acid in a molar ratio of from 3:1 to 0.1:1 at a pH above 7 and at a temperature below about 100° C. for a period not exceeding three hours and recovering the resultant oligomer.
Claim 19
Dependent Claim
22 words
The method of claim 14 wherein the aromatic carboxylic acid is an unsubstituted or substituted salicylic acid and the aldehyde is formaldehyde.
Claim 20
Dependent Claim
32 words
The method of claim 15 wherein the unsubstituted or substituted salicylic acid is selected from salicylic acid, acetyl salicylic acid, or a mono- or di-C 1 -C 8 alkyl substituted salicylic acid.
Claim 21
Independent Claim
20 words
The method of claims 15 or 16 wherein the unsubstituted or substituted salicylic acid is 3,5 di-tertiary butyl salicylic acid.
References Cited (Backward Citations)
US2981738A
Cited
US2981733A
Cited
US3672935A
Cited
US3427180A
Cited
US3488207A
Cited
US3516845A
Cited
US3767449A
Cited
US3772052A
Cited
US3934070A
Cited
US3723156A
Cited
US3864146A
Cited
US3983292A
Cited
US3896255A
Cited
US3871900A
Cited
GB1445113A
Cited
US4051303A
Cited
US4046941A
Cited
US3924027A
Cited
US3821010A
Cited
US3819396A
Cited
US4159208A
Cited
US4121013A
Cited
US4076887A
Cited
US4125675A
Cited
US4147830A
Cited
US4087284A
Cited
US4199619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |