US3565887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated and long chain esters of cyclodextrin
Assignee: Unilever Bestfoods North America
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Filing: 1968-05-15
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Granted: 1971-02-23
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Expires: 1988-05-15
Abstract
Abstract UNSATURATED AND LONG CHAIN SATURATED ESTERS OF CYCLODEXTRIN ARE DISCLOSED. THESE ESTERS MAY BE PREPARED BY A PROCESS WHICH COMPRISES REACTING CYCLODEXTRIN WITH AN ORGANIC ACID IN THE PRESENCE OF A STRONG ACID CATALYST SUCH AS P-TOLUENESULFONIC ACID IN AN APPARATUS DESIGNED FOR AZETROPIC REMOVAL OF WATER FORMED DURING THE REACTION. THE PRODUCTS OF THE INVENTION MAY BE USED AS CLATHRATING COMPOUNDS, AS SOAPS OR DETERGENTS, AS PLASTICIZERS FOR VARIOUS RESINS, AND IN POLYMERIZED FORM AS MOLECULAR SIEVES.
Inventors
- 👤 Stanley M Parmerter
- 👤 Earle E Allen Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:01
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/662; B; B01; B01J; B01J20/00; B01J20/22; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0012; C11D3/00; C11D3/16; C11D3/20; C11D3/22; C11D3/221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |