Patent US4753497A successfully refreshed from Google Patents.
Patent US4347283A successfully refreshed from Google Patents.
US4347283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer-onto-plain paper type pressure-sensitive copying paper
Assignee: Mitsubishi Paper Mills Ltd
•
Filing: 1981-03-05
•
Granted: 1982-08-31
•
Expires: 2001-03-05
Abstract
Abstract A transfer-onto-plain paper type pressure-sensitive copying paper having a colorless coating layer which forms a transferred colored image could be obtained by coating a substrate with double capsules and wax enclosing said double capsules, which double capsules have been prepared by previously forming primary microcapsules containing, as a core material, either colorless electron-donating color former or colorless electron-accepting color developer which reacts with said color former to give a colored product, enclosing the formed primary microcapsules in whichever of the color former or the color developer is not contained in the primary microcapsules, and then microencapsulating the enclosed primary microcapsules to form double capsules.
Inventors
- 👤 Shigetoshi Hiraishi
- 👤 Toshihiko Matsushita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:16
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
A transfer-onto-plain paper type pressure-sensitive copying paper produced by coating a substrate with double capsules and wax enclosing said double capsules, which double capsules have been prepared by previously forming primary microcapsules containing, as a core material, either colorless electron-donating color former or colorless electron-accepting color developer which reacts with said color former to give a colored product, enclosing the formed primary microcapsules in whichever of the color former or the color developer is not contained in the primary microcapsules, and then microencapsulating the enclosed primary microcapsules to form double capsules.
Claim 2
Dependent Claim
91 words
A transfer-onto-plain paper type pressure-sensitive copying paper produced by coating a substrate with double capsules and wax enclosing said double capsules, which double capsules have been prepared by previously forming primary microcapsules containing, as a core material, either colorless electron-donating color former or colorless electron-accepting color developer which reacts with said color former to give a colored product, enclosing the formed primary microcapsules in whichever of the color former or the color developer is not contained in the primary microcapsules, and then microencapsulating the enclosed primary microcapsules to form double capsules.
Claim 3
Dependent Claim
21 words
A transfer-onto-plain paper type pressure-sensitive copying paper according to claim 1, wherein the double capsules contain one or more primary capsules.
Claim 4
Dependent Claim
32 words
A transfer-onto-plain paper type pressure-sensitive copying paper according to claim 2, wherein the primary capsules are obtained by any of a monomer polymerization method, a phase separation method and a spray-drying method.
Claim 5
Dependent Claim
23 words
A transfer-onto-plain paper type pressure-sensitive copying paper according to claim 1, wherein the double capsules were obtained by an in situ encapsulation method.
Claim 6
Dependent Claim
33 words
A transfer-onto-plain paper type pressure-sensitive copying paper according to claim 1, wherein the substrate is any of paper, nonwoven fabric, plastics film, synthetic paper, metallic foil and composite sheets obtained by combining them.
References Cited (Backward Citations)
US3738857A
Cited
US3955026A
Cited
US4170483A
Cited
US4165398A
Cited
US4197346A
Cited
EP0023613A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |