Patent US4022735A successfully refreshed from Google Patents.
US4022735A
Expired / Lapsed
US
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Color developing coating compositions containing reactive pigments particularly for manifold copy paper
Assignee: Georgia Kaolin Co
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Filing: 1975-08-22
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Granted: 1977-05-10
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Expires: 1995-08-22
Abstract
Abstract A color developing coating and coated paper are provided in which a paper sheet is coated with a mixture of dispersing agent, adhesive and a reactive pigment made up of essentially from the group bentonite and montmorillonite admixed with kaolinite, a polyvalent cation and a ligand.
Inventors
- 👤 Thomas D. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:27
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; B41M5/1555; Y; Y10; Y10S; Y10S101/00; Y10S101/29; Y10S106/00; Y10S106/04; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
51 words
A color developing coating composition for manifold copy paper and the like comprising a mixture of a dispersing agent, an adhesive and a reactive pigment consisting essentially of a mixture of salt of a polyvalent cation, a ligand, kaolinite and a member selected from the group consisting of bentonite and montmorillonite.
Claim 2
Dependent Claim
51 words
A color developing coating composition for manifold copy paper and the like comprising a mixture of a dispersing agent, an adhesive and a reactive pigment consisting essentially of a mixture of salt of a polyvalent cation, a ligand, kaolinite and a member selected from the group consisting of bentonite and montmorillonite.
Claim 3
Dependent Claim
16 words
A color developing coating composition as claimed in claim 1 wherein the kaolinite is calcined kaolinite.
Claim 4
Dependent Claim
15 words
A color developing coating composition as claimed in claim 1 wherein the ligand is 1,6-Hexanediamine.
Claim 5
Dependent Claim
21 words
A color developing coating composition as claimed in claim 1 wherein the salt of a polyvalent ion is CuCl 2 .
Claim 6
Dependent Claim
31 words
A color developing coating composition as claimed in claim 1 wherein the ratio of the member selected from the group consisting of montmorillonite and bentonite to kaolinite is 25% to 75%.
Claim 7
Dependent Claim
40 words
A color developing coating composition as claimed in claim 1 wherein the ratio of the member selected from the group consisting of montmorillonite and bentonite to kaolinite is in the range 20% to 35% montmorillonite to 80% to 65% kaolinite.
Claim 8
Dependent Claim
15 words
A color developing coating composition as claimed in claim 1 wherein the adhesive is latex.
Claim 9
Dependent Claim
20 words
A color developing coating composition as claimed in claim 1 wherein the dispersing agent is the sodium salt of polyacrylamide.
References Cited (Backward Citations)
US2885374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |