US3746558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspensions of hydrophobic starch esters
Assignee: Scholten Honig Res Nv nl
•
Filing: 1971-07-09
•
Granted: 1973-07-17
•
Expires: 1991-07-09
Abstract
Abstract A STABLE COLLOIDAL AQUEOUS SUSPENSION CONTAINING 50% BY WEIGHT SUBGRANULAR HYDROPHOBIC STARCH ESTER PARTICLES HAVING A WEIGHT AVERAGE SIZE OF 0.1-1.0 MICRON, THE STARCH CONTAINING ESTER GROUPS IN A PROPORTION CORRESPONDING TO A DEGREE OF SUBSTITUTION OF 0.1-1.0, WHICH CONSIST OF AN ALIPHATIC GROUP OF 3 TO 17 CARBON ATOMS AND/OR AN AROMATIC GROUP OF 6-12 CARBON ATOMS. THE SUSPENSION IS PREPARED BY TREATING A GRANULAR STARCH ESTER UNDER SUPERATMOSPHERIC PRESSURE AND SUDDENLY RELEASING THE PRESSURE. THE SUSPENSIONS CAN BE USED FOR COATING PAPER, SIZING YARNS, AND BINDING NON-WOVENS.
Inventors
- 👤 F Berkhout
- 👤 W Nieuwenhuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:17
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/32; C03C25/321; C08; C08B; C08B31/00; C08B31/02; C08B31/04; D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/11; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/54; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/5313; Y10T29/53174; Y10T29/53178
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |