US2742396A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ointment base
Assignee: Purdue Research Foundation
•
Filing: 1952-08-13
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Granted: 1956-04-17
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Expires: 1972-08-13
Abstract
No abstract record available.
Inventors
- 👤 Glen J Sperandio
- 👤 John B Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:26
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A POWDERED MIXTURE CAPABLE OF FORMING A HYDROPHILIC PHARMACEUTICAL EXTENDING MEDIUM UPON THE ADDITION OF WATER, COMPRISING ABOUT 20 TO ABOUT 25 PARTS OF A POLYETHYLENE GLYCOL HAVING MOLECULAR WEIGHT OF NOT LESS THAN ABOUT 4,000, ABOUT 20 TO ABOUT 50 PARTS OF SODIUM STEARATE, ABOUT 20 TO ABOUT 50 PARTS OF STEARIC ACID, ABOUT 1 TO ABOUT 1.25 PARTS OF CHOLESTEROL AND FROM ABOUT 4 TO ABOUT 5 PARTS OF WATER-COMPATIBLE PHARMACEUTICALLY COMPATIBLE DIPERSING AGENT.
Claim 2
Dependent Claim
76 words
A POWDERED MIXTURE CAPABLE OF FORMING A HYDROPHILIC PHARMACEUTICAL EXTENDING MEDIUM UPON THE ADDITION OF WATER, COMPRISING ABOUT 20 TO ABOUT 25 PARTS OF A POLYETHYLENE GLYCOL HAVING MOLECULAR WEIGHT OF NOT LESS THAN ABOUT 4,000, ABOUT 20 TO ABOUT 50 PARTS OF SODIUM STEARATE, ABOUT 20 TO ABOUT 50 PARTS OF STEARIC ACID, ABOUT 1 TO ABOUT 1.25 PARTS OF CHOLESTEROL AND FROM ABOUT 4 TO ABOUT 5 PARTS OF WATER-COMPATIBLE PHARMACEUTICALLY COMPATIBLE DIPERSING AGENT.
References Cited (Backward Citations)
US1500276A
Cited
US1813109A
Cited
US1930853A
Cited
US2484637A
Cited
US2584166A
Cited
US2540253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |