Patent US4985390A successfully refreshed from Google Patents.
US4985390A
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US
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Thermosensitive recording medium
Assignee: Kao Corp
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Filing: 1989-04-11
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Granted: 1991-01-15
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Expires: 2009-04-11
Abstract
Abstract A thermosensitive recording medium comprises a substrate and a thermosensitive, coloring layer, provided on the substrate, comprising a binder, a colorless or light-colored electron-donating dye, an electron-accepting compound to react with the electron-donating dye and form a coloring matter and then an ester compound obtained from a fatty acid having 20 to 28 carbon atoms and a straight or cyclic alcohol, the ester having a melting point of 50 to 100 degree C. and one or more non-phenolic hydroxy group. It is improved in prevention from fogging and sensitivity.
Inventors
- 👤 Norihiko Nakashima
- 👤 Yoshiji Kanoh
- 👤 Atsushi Suzuki
- 👤 Sadashi Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:04
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
A thermosensitive recording medium which comprises a substrate and a thermosensitive, coloring layer provided on the substrate, said thermosensitive coloring layer comprising a binder, a colorless or light-colored electron-donating dye, an electron-accepting compound to react with said electron-donating dye to form a coloring matter and an ester compound obtained from a fatty acid having 20 to 28 carbon atoms and a straight or cyclic alcohol, said ester having a melting point of 50 to 100 degrees C. and at least one non-phenolic hydroxy group.
Claim 2
Dependent Claim
84 words
A thermosensitive recording medium which comprises a substrate and a thermosensitive, coloring layer provided on the substrate, said thermosensitive coloring layer comprising a binder, a colorless or light-colored electron-donating dye, an electron-accepting compound to react with said electron-donating dye to form a coloring matter and an ester compound obtained from a fatty acid having 20 to 28 carbon atoms and a straight or cyclic alcohol, said ester having a melting point of 50 to 100 degrees C. and at least one non-phenolic hydroxy group.
Claim 3
Dependent Claim
66 words
The medium as claimed in claim 1, wherein said ester is a partially esterified compound obtained from an aliphatic acid having no hydroxy group and having 20 to 28 carbon atoms and a straight or cyclic polyhydric alcohol or an ester compound obtained from an aliphatic acid having a hydroxy group and 20 to 28 carbon atoms and a straight or cyclic monohydric or polyhydric alcohol.
Claim 4
Dependent Claim
34 words
The medium as claimed in claim 1, wherein said ester is a glyceride mixture comprising 70 percent by weight or more of a monoglyceride of a fatty acid having 22 to 28 carbon atoms.
Claim 5
Dependent Claim
24 words
The medium as claimed in claim 1, wherein said layer comprises 5 to 50 percent by weight, as the solid, of the ester compound.
References Cited (Backward Citations)
JPH03249690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |