Patent US2516846A successfully refreshed from Google Patents.
US3459731A
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Cyclodextrin polyethers and their production
Assignee: Unilever Bestfoods North America
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Filing: 1966-12-16
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Granted: 1969-08-05
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Expires: 1986-12-16
Abstract
No abstract record available.
Inventors
- 👤 Robert E Gramera
- 👤 Ronald J Caimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:20
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0012; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4883; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A CYCLODEXTRIN POLYETHER REPRESENTED BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
8 words
A CYCLODEXTRIN POLYETHER REPRESENTED BY THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2518135A
Cited
US2996551A
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US2761247A
Cited
US2945025A
Cited
US2900268A
Cited
US3042666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |