US3704271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin-starch
Assignee: Dynatron Research Corp
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Filing: 1970-10-29
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Granted: 1972-11-28
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Expires: 1990-10-29
Abstract
Abstract A POLYOLEFIN-MODIFIED STARCH WHERE AN OLEFIN IS POLYMERIZED DIRECTLY UPON THE SURFACE OF STARCH TO YIELD A STARCH/POLYOLEFIN COMPOSITE (SPS). SPS IS PREPARED BY POLYMERIZING AN OLEFIN MONOMER ON THE SURFACE OF STARCH UPON WHICH A SUITABLE CATALYST HAS BEEN ADSORBED, PREFERABLY A CATALYST OF THE ZIEGLER-NATTA TYPE, I.E. AN ORGANOMETALLIC TRANSITION METAL CATALYST SYSTEM. THESE SURFACE POLYMERIZED POLYOLEFIN STARCHES (SPS) ARE USEFUL IN A WIDE VARIETY OF APPLICATIONS INCLUDING THEIR USE IN WATER-RESISTANT ADHESIVES AND BINDERS, PAPER SIZES AND COATING, TEXTILE SIZES, PAINT EXTENDERS, AND A WIDE VARIETY OF OTHER USES.
Inventors
- 👤 Helmut F Prahl
- 👤 Frederick M Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:44
CPC Classifications
C; C09; C09J; C09J151/00; C09J151/02; C08; C08F; C08F251/00; C09D; C09D151/00; C09D151/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31971
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |