US3737370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making paper and paper made therefrom using liquid cationic starch derivatives
Assignee: Indopco Inc
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Filing: 1972-03-06
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Granted: 1973-06-05
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Expires: 1992-03-06
Abstract
Abstract NOVEL LIQUID CATIONIC STARCH DERIVATIVES PREPARED BY REACTION OF STARCH WITH EPICHLOROHYDRIN-AMMONIUM HYDROXIDE CONDENSATES ARE USEFUL AS ADDITIVES IN THE MANUFACTURE OF PAPER WHEREIN THEY INCREASE THE RETENTION OF INORGANIC PIGMENTS BY THE CELLULOSE PULP AND STRENGTHEN THE RESULTING PAPER.
Inventors
- 👤 W Jarowenko
- 👤 M Rutenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:52
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; D21H17/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |