US3759744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic recording paper and method of making
Assignee: CONS PAPER Inc
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Filing: 1971-08-26
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Granted: 1973-09-18
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Expires: 1991-08-26
Abstract
Abstract ELECTROSTATIC RECORDING PAPER IS MADE BY APPLYING THREE SUCCESSIVE AQUEOUS COATES TO THE MACHINE GLAZED SIDE OF A PAPER WEB. THE FIRST COAT CONTAINS TITANIUM DIOXIDE AND AN ELECTROCONDUCTIVE WATER DISPERSIBLE POLYMER OF A VINYLBENZYL QUATERNARY AMMONIUM COMPOUND. THE SECOND COAT IS OXIDIZED STARCH AND CALCIUM CARBONATE. THE THIRD COAT CONTAINS CALCIUM CARBONATE AND A CARBOXYLATED POLYVINYL ACETATE IN AMMONIACAL SOLUTION. THE WEB IS DRIED BETWEEN SUCCESSIVE COATINGS AND MAY BE FINALLY STEAM TREATED.
Inventors
- 👤 L Schliesman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:50
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0205; G03G5/0217; G03G5/10; G03G5/101; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/258; Y10T428/31504; Y10T428/31855; Y10T428/31935; Y10T428/31971; Y10T428/31993
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |