Patent US4435471A successfully refreshed from Google Patents.
US4435471A
Expired / Lapsed
US
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Transfer-onto-plain paper type of pressure-sensitive copying paper
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1982-06-10
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Granted: 1984-03-06
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Expires: 2002-06-10
Abstract
Abstract Pressure-sensitive copying paper prepared by coating a substrate with a single layer containing a color forming reaction system comprising a metal compound and ligand and further containing a wax can reproduce a clear and fast image onto plain paper.
Inventors
- 👤 Toshihiko Matsushita
- 👤 Shigetoshi Hiraishi
- 👤 Sadao Morishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:07
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; Y; Y10; Y10S; Y10S428/00; Y10S428/914
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
A transfer-onto-plain paper type of pressure-sensitive copying paper prepared by coating the back of a substrate with a single layer containing a chelate color forming reaction system comprising a chelate forming metal compound and ligand and further containing a wax, both of said metal compound and ligand being microencapsulated.
Claim 2
Dependent Claim
49 words
A transfer-onto-plain paper type of pressure-sensitive copying paper prepared by coating the back of a substrate with a single layer containing a chelate color forming reaction system comprising a chelate forming metal compound and ligand and further containing a wax, both of said metal compound and ligand being microencapsulated.
Claim 3
Dependent Claim
42 words
A transfer-onto-plain paper type of pressure-sensitive copying paper of claim 1, wherein the wax is selected from the group consisting of waxes of animal, vegetable, mineral, and petroleum, modified waxes, hydrogenated waxes, synthetic waxes, and saturated or unsaturated fatty acid amide waxes.
Claim 4
Dependent Claim
18 words
A transfer-onto-plain paper type of pressure-sensitive copying paper of claim 2, wherein the wax is a petroleum wax.
Claim 5
Dependent Claim
21 words
A transfer-onto-plain paper type of pressure-sensitive copying paper of claim 3, wherein the petroleum wax is paraffin wax or microcrystalline wax.
Claim 6
Dependent Claim
28 words
A transfer-onto-plain paper type of pressure-sensitive copying paper of claim 1, wherein the color forming reaction system consisting of a metal compound and ligand is water-soluble or oil-soluble.
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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |