Patent US4845071A successfully refreshed from Google Patents.
US4845071A
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Heatsensitive recording material
Assignee: Fujifilm Holdings Corp
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Filing: 1988-03-16
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Granted: 1989-07-04
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Expires: 2008-03-16
Abstract
Abstract A negative type heatsensitive recording material which can realize high contrast image suitable to overhead projector, comprising on a support a heatsensitive layer prepared by coating a composition containing an emulsified dispersion, which is obtained by dissolving a colorless or light colored electron donating dye precursor and a color developer in an organic solvent slightly soluble or insoluble in water then subjecting the resulting solution to an emulsifying dispersion treatment, and decolorizercontaining microcapsules.
Inventors
- 👤 Akihiro Shimomura
- 👤 Toshimasa Usami
- 👤 Seiji Hatakeyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:34
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/28; B41M5/287; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
68 words
A heat-sensitive recording material which comprises on a support a heat-sensitive layer prepared by coating a composition containing an emulsified dispersion, which is obtained by dissolving a colorless or light colored electron donating dye precursor and a color developer in an organic solvent slightly soluble or insoluble in water to cause a color-forming reaction and then subjecting the resulting solution to an emulsifying dispersion treatment, and decolorizer-containing microcapsules.
Claim 2
Dependent Claim
68 words
A heat-sensitive recording material which comprises on a support a heat-sensitive layer prepared by coating a composition containing an emulsified dispersion, which is obtained by dissolving a colorless or light colored electron donating dye precursor and a color developer in an organic solvent slightly soluble or insoluble in water to cause a color-forming reaction and then subjecting the resulting solution to an emulsifying dispersion treatment, and decolorizer-containing microcapsules.
Claim 3
Dependent Claim
20 words
The heat-sensitive recording material as claimed in claim 1, wherein said organic solvent is an ester or mixture of esters.
Claim 4
Dependent Claim
24 words
The heat-sensitive recording material as claimed in claim 1, wherein a melting point of said color developer is between 50° C. and 250° C.
Claim 5
Dependent Claim
28 words
The heat-sensitive recording material as claimed in claim 3, wherein said color developer is selected from a group consisting of phenols slightly soluble in water and organic acids.
References Cited (Backward Citations)
US4760048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |