Patent US3553191A successfully refreshed from Google Patents.
US3553191A
Expired / Lapsed
US
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Aminoethyl cyclodextrin and method of making same
Assignee: Unilever Bestfoods North America
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Filing: 1968-05-21
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Granted: 1971-01-05
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Expires: 1988-05-21
Abstract
Abstract CYCLODEXTRIN IS REACTED WITH ETHYLENIMINE TO YIELD AMINOETHYLCYCLODEXTRIN. THE AMINOETHYL CYCLODEXTRIN MAY BE USED AS A CLATHRATING COMPOUND OR AS A PAPER SIZING.
Inventors
- 👤 Stanley M Parmerter
- 👤 Earle E Allen Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:14
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0012
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |