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US3743570A
Expired / Lapsed
US
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Process for producing a nonwoven fabric web from a suspension of polyolefin fibers and a hydrophilic colloidal polymeric additive
Assignee: Fort James Corp
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Filing: 1971-03-03
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Granted: 1973-07-03
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Expires: 1991-03-03
Abstract
Abstract A MASS OF POLYOLEFIN FIBERS HAVING A DISPERSIBILITY INDEX OF LESS THAN ABOUT 300. THE POLYOLEFIN FIBERS ARE RENDERED WATER DISPERSIBLE FOR THE USE IN PAPERMAKING BY ADDING FROM ABOUT 0.5 TO ABOUT 20% BY WEIGHT OF THE FIBERS OF A HYDROPHILIC COLLOIDAL POLYMERIC ADDITIVE SELECTED FROM THE GROUP CONSISTING OF ANIONIC-CATIONIC COMPLEXES AND STARCH. THE PREFERRED HYDROPHILIC COLLODIAL POLYMERIC ADDITIVE IS POTATO STARCH. THE POLYOLEFIN FIBERS EMPLOYED HAVE A SURFACE AREA GREATER THAN 1 SQUARE METER/GRAM.
Inventors
- 👤 C Yang
- 👤 W Kindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:49
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/1254; D21H13/00; D21H13/10; D21H13/12; D21H13/14; D21H17/00; D21H17/20; D21H17/33
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |