Patent US3950600A successfully refreshed from Google Patents.
US3950600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosensitive element, and its employ in the thermographic reproduction or record systems
Assignee: TIM SpA
•
Filing: 1974-07-08
•
Granted: 1976-04-13
•
Expires: 1994-07-08
Abstract
Abstract A temperature-responsive record material for use in a thermographic recording and reproducing apparatus comprising a supporting sheet carrying a single layer containing, as the temperature-sensitive composition, a mixture resulting by a dispersion of a basic chromogenic compound and of an acidic compound in a binder having as assential binding agent a latex or a mixture of a latex with a non-ionic cellulose ether.
Inventors
- 👤 Franco Knirsch
- 👤 Dino Lavagna
- 👤 Giorgio Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:32
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3372; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31888
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
81 words
In a temperature responsive record material comprising a supporting sheet having a single layer coated thereon comprising finely divided solid particles of a crystal violet lactone and finely divided particles of 4-4-isopropylidene-diphenol, wherein the improvement comprises having the particles dispersed in a binder matrix comprising a non-ionic cellulose ether mixed with a latex in a ratio of non-ionic cellulose ether to latex not greater than 3-97 parts by weight, the employ ratio of binding means/solids being variable from 1-1 to 1-25.
Claim 2
Dependent Claim
81 words
In a temperature responsive record material comprising a supporting sheet having a single layer coated thereon comprising finely divided solid particles of a crystal violet lactone and finely divided particles of 4-4-isopropylidene-diphenol, wherein the improvement comprises having the particles dispersed in a binder matrix comprising a non-ionic cellulose ether mixed with a latex in a ratio of non-ionic cellulose ether to latex not greater than 3-97 parts by weight, the employ ratio of binding means/solids being variable from 1-1 to 1-25.
Claim 3
Dependent Claim
20 words
In a record material according to claim 1, wherein said latex comprises a dispersion of vinyl chloride copolymer in water.
Claim 4
Dependent Claim
18 words
In a record material according to claim 1, wherein said latex comprises a dispersion of polystyrene in water.
Claim 5
Dependent Claim
19 words
In a record material according to claim 1, wherein said latex comprises a dispersion of styrene-butadiene copolymer in water.
Claim 6
Dependent Claim
19 words
In a record material according to claim 1, wherein said latex comprises a dispersion of styrene-butadiene carboxylate in water.
Claim 7
Dependent Claim
20 words
In a record material according to claim 1, wherein said latex comprises a dispersion of modified acrylic copolymer in water.
Claim 8
Dependent Claim
21 words
In a record material according to claim 1, wherein said latex comprises a dispersion of reticulated zinc acrylic copolymer in water.
Claim 9
Dependent Claim
20 words
In a record material according to claim 1, wherein said coating further comprises a white or lightly colored absorbing pigment.
Claim 10
Dependent Claim
16 words
In a record material according to claim 1, wherein said coating further comprises a lubricating agent.
Claim 11
Dependent Claim
21 words
In a record material according to claim 9, wherein said lubricating agent is a wax, a metal soap or a pigment.
Claim 12
Dependent Claim
21 words
In a record material according to claim 9, wherein said lubrication agent is a calcium, magnesium, silver, lithium or aluminum stearate.
Claim 13
Dependent Claim
17 words
In a record material according to claim 1, wherein said coating further comprises an optical whitening agent.
References Cited (Backward Citations)
US2663656A
Cited
US2967785A
Cited
US3244549A
Cited
US3451338A
Cited
US3539375A
Cited
US3561991A
Cited
US3666525A
Cited
US3792481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |