US2541285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous solutions of vitamin a esters
Assignee: Parke Davis and Co LLC
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Filing: 1945-03-24
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Granted: 1951-02-13
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Expires: 1965-03-24
Abstract
No abstract record available.
Inventors
- 👤 Albert L Rawlins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:14
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A VITAMIN PREPARATION COMPRISING AN OIL CONTAINING A VITAMIN A ALCOHOL ESTER OF A STRAIGHT CHAIN HIGHER ALIPHATIC CARBOXYLIC ACID, AND A SOLUBILIZING MONO-ESTER OF A STRAIGHT CHAIN ALIPHATIC CARBOXYLIC ACID CONTAINING 16 TO 21 CARBON ATOMS INCLUSIVE AND A STRAIGHT CHAIN POLYETHYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 700 AND 1500, SAID MONO-ESTER DISSOLVING THE OIL CONTAINING THE VITAMIN A ALCOHOL ESTER, AND SAID VITAMIN PREPARATION BEING SOLUBLE IN WATER TO FORM A CLEAR STABLE AQUEOUS SOLUTION.
Claim 2
Dependent Claim
79 words
A VITAMIN PREPARATION COMPRISING AN OIL CONTAINING A VITAMIN A ALCOHOL ESTER OF A STRAIGHT CHAIN HIGHER ALIPHATIC CARBOXYLIC ACID, AND A SOLUBILIZING MONO-ESTER OF A STRAIGHT CHAIN ALIPHATIC CARBOXYLIC ACID CONTAINING 16 TO 21 CARBON ATOMS INCLUSIVE AND A STRAIGHT CHAIN POLYETHYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 700 AND 1500, SAID MONO-ESTER DISSOLVING THE OIL CONTAINING THE VITAMIN A ALCOHOL ESTER, AND SAID VITAMIN PREPARATION BEING SOLUBLE IN WATER TO FORM A CLEAR STABLE AQUEOUS SOLUTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |