US3861941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive record sheet
Assignee: WTA Inc
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Filing: 1971-07-02
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Granted: 1975-01-21
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Expires: 1991-07-02
Abstract
Abstract A pressure-sensitive record sheet comprising pressurerupturable, liquid-droplet-containing microcapsule having walls of hydrophilic polymeric film-material such as gelatin wherein the liquid core-material is a water-immiscible oil having water dissolved therein together with additional material which is water-soluble such as a water-soluble colorless chromogenic dyeprecursor material or color-developing reactant material.
Inventors
- 👤 Bruce W Brockett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:18
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/10; B01J13/20; B01J13/203; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A PRESSURE-SENSITIVE RECORD SHEET MATERIAL COMPRISING A SUBSTRATE WEB HAVING BOUND ON A SURFACE A RANDOM DISPERSION OF LIQUID-DROPLET-CONTAINING PRESSURE-RUPTURABLE MICROCAPSULES HAVING HYDROPHILIC, ORGANIC POLYMERIC-FILM WALL MATERIAL AND CORE MATERIAL CONSISTING ESSENTIALLY OF: A WATER-IMMISCIBLE OIL WHICH IS CAPABLE OF DISSOLVING ABOUT ONE TO TEN PERCENT BY WEIGHT OF WATER; WATER; AND A WATER-SOLUBLE COLOR-FORMING REACTANT MATERIAL, ALL MUTUALLY DISSOLVED TO YIELD A CORE MATERIAL OF A SINGLE PHASE SOLUTION.
Claim 2
Dependent Claim
70 words
A PRESSURE-SENSITIVE RECORD SHEET MATERIAL COMPRISING A SUBSTRATE WEB HAVING BOUND ON A SURFACE A RANDOM DISPERSION OF LIQUID-DROPLET-CONTAINING PRESSURE-RUPTURABLE MICROCAPSULES HAVING HYDROPHILIC, ORGANIC POLYMERIC-FILM WALL MATERIAL AND CORE MATERIAL CONSISTING ESSENTIALLY OF: A WATER-IMMISCIBLE OIL WHICH IS CAPABLE OF DISSOLVING ABOUT ONE TO TEN PERCENT BY WEIGHT OF WATER; WATER; AND A WATER-SOLUBLE COLOR-FORMING REACTANT MATERIAL, ALL MUTUALLY DISSOLVED TO YIELD A CORE MATERIAL OF A SINGLE PHASE SOLUTION.
Claim 3
Dependent Claim
25 words
The pressure-sensitive record sheet material of claim 1 wherein the substrate web is paper and the oil is saturated with water and color-forming reactant material.
Claim 4
Dependent Claim
19 words
The pressure-sensitive record material of claim 1 wherein the oil is a mixture of tricresyl phosphate and tributyl phosphate.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |