US4567497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive recording paper
Assignee: Fujifilm Holdings Corp
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Filing: 1985-03-05
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Granted: 1986-01-28
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Expires: 2005-03-05
Abstract
Abstract A heat-sensitive recording paper is described, comprising a paper support and a heat-sensitive color-forming layer on the paper support, wherein the paper support contains a cationic softening agent, such as a maleic anhydride copolymer/polyalkylenepolyamine reaction product. This recording paper is excellent both in highspeed recording and curling properties.
Inventors
- 👤 Shigehisa Tamagawa
- 👤 Tetsuro Fuchizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:09
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/41; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
A heat-sensitive recording paper comprising a paper support and a heat-sensitive color-forming layer on the paper support, wherein the paper support contains a cationic softening agent.
Claim 2
Dependent Claim
26 words
A heat-sensitive recording paper comprising a paper support and a heat-sensitive color-forming layer on the paper support, wherein the paper support contains a cationic softening agent.
Claim 3
Dependent Claim
38 words
A recording paper as in claim 1, wherein the softening agent is selected from the group consisting of a maleic anhydride copolymer/polyalkylenepolyamine reaction product, a higher fatty acid/polyalkylenepolyamine reaction product, and quaternary ammonium salts of higher fatty acids.
Claim 4
Dependent Claim
18 words
A recording paper as in claim 2, wherein the softening agent is a maleic anhydride copolymer/polyalkylenepolyamine reaction product.
Claim 5
Dependent Claim
32 words
A recording paper as in claim 1, wherein the amount of the softening agent is from 0.01 to 1.0% by weight based on the dry weight of pulp forming the paper support.
Claim 6
Dependent Claim
32 words
A recording paper as in claim 1, wherein said paper support contains a sizing agent, and the weight ratio of the softening agent to the sizing agent is from 1/100 to 10/1.
Claim 7
Dependent Claim
30 words
A recording paper as in claim 5, wherein said sizing agent is selected from the group consisting of rosin, alkylketene dimers, higher fatty acid salts, paraffin wax, and alkenylsuccinic acid.
References Cited (Backward Citations)
JPS5798393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |