Patent US4415627A successfully refreshed from Google Patents.
US4415627A
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Chemically resistant thermosensitive recording paper
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1981-12-23
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Granted: 1983-11-15
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Expires: 2001-12-23
Abstract
Abstract A thermosensitive recording paper consisting of a dye precursor and a color developer capable of coloring said dye precursor on heating, wherein one type of overcoat layer selected from the group consisting of alginates, alumina sol, colloidal silica and a mixture of alumina sol with colloidal silica is provided as the topmost layer thereof to give improved chemical resistance and good printing quality with a reduced deterioration in sensitivity and no residues and sticking.
Inventors
- 👤 Masahiro Miyauchi
- 👤 Sadao Morishita
- 👤 Fumio Okumura
- 👤 Masahiro Higuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:40
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/426; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31725; Y10T428/31768; Y10T428/31772; Y10T428/31775
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
43 words
A chemically resistant thermosensitive recording paper, consisting of (a) a dye precursor and (b) a color developer capable of coloring said dye precursor on heating as principal consituent elements, characterized in that an alginate overcoat layer is provided as the topmost layer thereof.
Claim 2
Dependent Claim
43 words
A chemically resistant thermosensitive recording paper, consisting of (a) a dye precursor and (b) a color developer capable of coloring said dye precursor on heating as principal consituent elements, characterized in that an alginate overcoat layer is provided as the topmost layer thereof.
Claim 3
Dependent Claim
23 words
A chemically resistant thermosensitive recording paper according to claim 1, wherein the thickness of the alginate overcoat layer is 0.5 μm or more.
Claim 4
Dependent Claim
22 words
A chemically resistant thermosensitive recording paper according to claim 1, wherein the thickness of the overcoat layer is 3 to 12 μm.
Claim 5
Dependent Claim
16 words
A chemically resistant thermosetting recording paper according to claim 1 wherein the alginate is sodium alginate.
References Cited (Backward Citations)
US4168845A
Cited
JPS5381570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |