Patent US4601955A successfully refreshed from Google Patents.
Patent US3671310A successfully refreshed from Google Patents.
US3671310A
Expired / Lapsed
US
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Paper surface sizing process and product utilizing cationic amylose derivatives
Assignee: Indopco Inc
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Filing: 1968-05-07
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Granted: 1972-06-20
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Expires: 1988-05-07
Abstract
Abstract SIZING OF PAPER AND PAPERBOARD PRODUCTS WHICH COMPRISES APPLYING AN AQUEOUS DISPERSION OF A CATIONIC AMYLOSE DERIVATIVE TO AT LEAST ONE SURFACE OF A PREVOUSLY PREPARED CELLULOSIC WEB.
Inventors
- 👤 Gerald H Brown
- 👤 Emil D Mazzarella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:45
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/16; C; C09; C09J; C09J103/00; C09J103/14; C09J103/18; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; D21H17/29; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |