Patent US2680749A successfully refreshed from Google Patents.
US2680749A
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Water-soluble tocopherol derivatives
Assignee: Eastman Kodak Co
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Filing: 1951-12-01
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Granted: 1954-06-08
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Expires: 1971-12-01
Abstract
No abstract record available.
Inventors
- 👤 John D Cawley
- 👤 Max H Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:59
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/335; A61K31/35; A61K31/352; A61K31/353; A61K31/355; C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A WATER-SOLUBLE VITAMIN E-ACTIVE POLYETHYLENE GLYCOL ESTER OF A VITAMIN E-ACTIVE TOCOPHERYL ACID ESTER OF A DICARBOXYLIC ACID, THE POLYETHYLENE GLYCOL MOIETY OF SAID ESTER HAVING A MOLECULAR WEIGHT IN THE RANGE FROM 400 TO 6000.
Claim 2
Dependent Claim
36 words
A WATER-SOLUBLE VITAMIN E-ACTIVE POLYETHYLENE GLYCOL ESTER OF A VITAMIN E-ACTIVE TOCOPHERYL ACID ESTER OF A DICARBOXYLIC ACID, THE POLYETHYLENE GLYCOL MOIETY OF SAID ESTER HAVING A MOLECULAR WEIGHT IN THE RANGE FROM 400 TO 6000.
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) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |