US3634121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid-sensitized record sheet
Assignee: Appvion LLC
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Filing: 1969-03-17
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Granted: 1972-01-11
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Expires: 1989-03-17
Abstract
Abstract This invention relates to means for sensitizing sheet record material, such as paper, for developing color in applied colorless marking fluids which are essentially basic in chemical properties, the sensitization consisting of applying to the record material particles of paper-coating-type of fine mineral particles having adsorbed thereon acid-reacting oil-soluble polymeric material to develop strong colors in applied colorless marking liquids of oily nature. The polymeric materials of acidreactant properties preferably are of the oil-soluble phenolic film-forming polymeric type, although other acid-reacting oilsoluble polymeric materials are eligible for use.
Inventors
- 👤 Bruce W Brockett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
14 words
The record sheet material of claim 1 wherein the mineral particles are kaolin particles.
Claim 2
Dependent Claim
17 words
The record sheet material of claim 1 wherein the polymeric film material is a p-phenylphenol-aldehyde condensation product.
Claim 3
Dependent Claim
14 words
The record sheet material of claim 3 wherein the mineral particles are kaolin particles.
References Cited (Backward Citations)
US3003990A
Cited
US2972547A
Cited
US3068185A
Cited
US3236802A
Cited
US3455721A
Cited
US3427180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |