Patent US2935449A successfully refreshed from Google Patents.
US2935449A
Expired / Lapsed
US
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Stabilized vitamin a compositions
Assignee: Pfizer Inc
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Filing: 1958-04-14
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Granted: 1960-05-03
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Expires: 1978-04-14
Abstract
No abstract record available.
Inventors
- 👤 Bavley Abraham
- 👤 Albert E Timreck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:30
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A STABILIZED VATIAMIN A COMPOSITION COMPRISING AN INTIMATE MIXTURE IN GELATIN OF A VITAMIN A FATTY ACID ESTER HAVING AT LEAST EIGHT CARBON ATOMS IN THE ACYL MOIETY OF THE ESTER GROUPING, A STABILIZER SELECTED FROM THE GROUP CONSISTING OF HYDROXYCARBOXYLC ACIDS, KETOCARBOXYLIC ACIDS, THEIR ALKALI METAL SALTS AND ALIPHATIC HYDROCARBON CARBOXYLIC ACID ESTER, AND A SYNERGISTIC ANTIOXIDANT MIXTURE COMPRISING 6-ETHOXY-2,2,4-TRIMETHYL1,2-DIHYDROQUINOLINE TOGETHER WITH A PHENOLIC ANTIOXIDANT SELECTED FROM THE GROUP CONSISTING OF ALKYLATED PHENOLS AND ACYLATED PHENOLS WHEREIN THE ALKYL GROUP HAS FROM ONE TO SIX CARBON ATOMS AND THE ACYL GROUP HAS FROM ONE TO FIVE CARBON ATOMS.
Claim 2
Dependent Claim
99 words
A STABILIZED VATIAMIN A COMPOSITION COMPRISING AN INTIMATE MIXTURE IN GELATIN OF A VITAMIN A FATTY ACID ESTER HAVING AT LEAST EIGHT CARBON ATOMS IN THE ACYL MOIETY OF THE ESTER GROUPING, A STABILIZER SELECTED FROM THE GROUP CONSISTING OF HYDROXYCARBOXYLC ACIDS, KETOCARBOXYLIC ACIDS, THEIR ALKALI METAL SALTS AND ALIPHATIC HYDROCARBON CARBOXYLIC ACID ESTER, AND A SYNERGISTIC ANTIOXIDANT MIXTURE COMPRISING 6-ETHOXY-2,2,4-TRIMETHYL1,2-DIHYDROQUINOLINE TOGETHER WITH A PHENOLIC ANTIOXIDANT SELECTED FROM THE GROUP CONSISTING OF ALKYLATED PHENOLS AND ACYLATED PHENOLS WHEREIN THE ALKYL GROUP HAS FROM ONE TO SIX CARBON ATOMS AND THE ACYL GROUP HAS FROM ONE TO FIVE CARBON ATOMS.
References Cited (Backward Citations)
US2218591A
Cited
US2562970A
Cited
US2689202A
Cited
US2693435A
Cited
US2686751A
Cited
US2711962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |