US3769062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive recording paper
Assignee: Fujifilm Holdings Corp
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Filing: 1971-07-08
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Granted: 1973-10-30
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Expires: 1991-07-08
Abstract
Abstract A pressure-sensitive recording paper comprising a layer of microcapsules containing a color former and a layer of a color developer, said layers coated on the same support or different supports, and at least one of said layers containing an ether derivative of an aromatic hydroxyl compound.
Inventors
- 👤 S Ishige
- 👤 T Hayashi
- 👤 H Matsukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:26
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
The pressure-sensitive recording paper of claim 1, wherein said ether derivative is a member selected from the group consisting of p-chloroanisole, p-methylanisole, p-acetoxyanisole, p-acetaminoanisole, o-chloroanisole, m-chloroanisole, N- Beta -cyanoethyl-p-anisidene, p-methoxyacetophenone, p-methoxybenzophenone, 2,2-bi(p-methoxyphenyl) propane, catechol dimethyl ether, resorcinol dimethyl ether, hydroquinone dimethyl ether, catechol diethyl ether, resorcinol dipropyl ether, hydroquinone dibutyl ether, p-methoxybenzoic acid ethyl ester, p-ethoxybenzenesulfonamide, 1-phenoxy-2-cyanoethane, 1-phenoxy-2-hydroxyethane, 1-phenoxy-2-chloroethane, diphenyl ether, hydroquinone dibenzyl ether, 1,2-dimethoxy-4-(p-methoxyphenoxy) benzene, 1,4-dimethoxy-2-octadecyl benzene, 1-(p- Alpha , Alpha -dimethylbenzylphenoxy)-4-ethoxybenzene, 1-ethoxy-2,3-methylene dioxy benzene, 2,5-dimethoxybenzenesulfonamide, 1,4-dibutyl-2, 5-dimethoxybenzene, 1,4-diethoxyanthracene, 5-methyl-1,4-diethoxyanthracene, 8-chloro-1,4-diethoxyanthracene, 9,10-dimethoxyanthracene, 4-methyl-9,10-dimethoxyanthracene, 7-chloro-9,10-dimethoxyanthracene, 1-methoxynaphthalene, 2-ethoxynaphthalene, 4-chloro-1-methoxynaphthalene, 5-METHYL-1-methoxynaphthalene, 8-chloro-2-ethoxynaphthalene, and 6-propyl-2-ethoxynaphthalene.
Claim 2
Dependent Claim
35 words
The pressure-sensitive recording paper of claim 1, wherein said color former is a member selected from the group consisting of malachite green, benzoyl leuco methylene blue, crystal violet lactone, Rhodamine B lactam, 3-dialkylamino-7-dialkylamino-fluorans, and 3-methyl-2,2''-spirobi(benzo(f)chromene).
Claim 3
Dependent Claim
27 words
The pressure-sensitive recording paper of claim 1, wherein said color developer is a member selected from the group consisting of active clay substances and organic acidic substances.
Claim 4
Dependent Claim
27 words
The pressure-sensitive recording paper of claim 4, wherein said active clay substance is a member selected from the group consisting of active clay attapulgite, zeolite and bentonite.
Claim 5
Dependent Claim
31 words
The pressure-sensitive recording paper of claim 4, wherein said organic acidic substance is a member selected from the group consisting of succinic acid, tannic acid, gallic acid, pentachlorophenol, and phenol resins.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |