US4486764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plain paper transfer type pressure-sensitive copying paper
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1983-11-22
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Granted: 1984-12-04
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Expires: 2003-11-22
Abstract
Abstract A plain paper transfer type pressure-sensitive copying paper comprising a coated paper obtained by adding a surfactant to a coating color comprising a color-forming agent, a color-developing agent capable of reacting with said color-forming agent to yield a colored product and a wax; and coating the color to the surface of a support is free from the self color-formation of coated surface at the time of typing under pressure and is excellent in transferability and color-formability.
Inventors
- 👤 Toshihiko Matsushita
- 👤 Sadao Morishita
- 👤 Shigetoshi Hiraishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:53
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
In a plain paper transfer type pressure-sensitive copying paper comprising (A) a coated paper obtained by coating on the surface of a support an aqueous coating color comprising (1) a colorless electron-donating color-forming agent , (2) a colorless electron-accepting color-developing agent capable of reacting with said color-forming agent to yield a colored product, one or both of the color-forming agent and the color-developing agent being micro-encapsulated, and (3) a wax and (B) a plain paper facing with the coated surface of the coated paper; the improvement comprising the said aqueous coating color also containing a surfactant in an amount of 3-15% by weight based on the solid content of said coating color and a styrene-butadiene copolymer as a water-soluble polymer and/or latex in an amount of 5-30% by weight based on the solid content of said coating color.
Claim 2
Dependent Claim
138 words
In a plain paper transfer type pressure-sensitive copying paper comprising (A) a coated paper obtained by coating on the surface of a support an aqueous coating color comprising (1) a colorless electron-donating color-forming agent , (2) a colorless electron-accepting color-developing agent capable of reacting with said color-forming agent to yield a colored product, one or both of the color-forming agent and the color-developing agent being micro-encapsulated, and (3) a wax and (B) a plain paper facing with the coated surface of the coated paper; the improvement comprising the said aqueous coating color also containing a surfactant in an amount of 3-15% by weight based on the solid content of said coating color and a styrene-butadiene copolymer as a water-soluble polymer and/or latex in an amount of 5-30% by weight based on the solid content of said coating color.
References Cited (Backward Citations)
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Cited
US4199618A
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US4139218A
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US4299411A
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US4347283A
Cited
US4411451A
Cited
US4387913A
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US4435471A
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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) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |