Patent US2540253A successfully refreshed from Google Patents.
US2540253A
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Granulation process
Assignee: Merck and Co Inc
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Filing: 1949-02-08
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Granted: 1951-02-06
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Expires: 1969-02-08
Abstract
No abstract record available.
Inventors
- 👤 Walter C Gakenheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2095; A61K9/0002; A61K9/0007; A61K9/14; A61K9/16; A61K9/1605; A61K9/1629; A61K9/1641; A61K9/2072; A61K9/2077
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE PROCESS OF PREPARING GRANULES OF THERAPEUTIC MATERIAL COMPRISING THE STEPS OF MIXING AND ACTIVE THERAPEUTIC AGENT, TOGETHER WITH A SOLID WATER-SOLUBLE POLYETHYLENE GLYCOL DISSOLVED IN AN ANHYDROUS CHLORINATED NON-POLAR SOLVENT SAID POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 6000 TO 7500, FORMING THE MOIST NONFLUID MASS THUS OBTAINED INTO DISCRETE GRANULES AND REMOVING SAID NON-POLAR SOLVENT FROM SAID GRANULES.
Claim 2
Dependent Claim
61 words
THE PROCESS OF PREPARING GRANULES OF THERAPEUTIC MATERIAL COMPRISING THE STEPS OF MIXING AND ACTIVE THERAPEUTIC AGENT, TOGETHER WITH A SOLID WATER-SOLUBLE POLYETHYLENE GLYCOL DISSOLVED IN AN ANHYDROUS CHLORINATED NON-POLAR SOLVENT SAID POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 6000 TO 7500, FORMING THE MOIST NONFLUID MASS THUS OBTAINED INTO DISCRETE GRANULES AND REMOVING SAID NON-POLAR SOLVENT FROM SAID GRANULES.
References Cited (Backward Citations)
US2149005A
Cited
US2195596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |