US3074852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pharmaceuticals with delayed release
Assignee: Wyeth LLC
•
Filing: 1960-06-06
•
Granted: 1963-01-22
•
Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Mayron David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:38
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42; A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2022; A61K9/2027; A61K9/205; A61K9/2054; A61K9/28; A61K9/2806; A61K9/2833; A61K9/284; A61K9/2846; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
A PROCESS FOR MAKING SUSTAINED ACTION PHARMACEUTICAL TABLETS COMPRISING INTIMATELY MIXING AS THE ONLY ESSENTIALLY ACTIVE INGREDIENTS NECESSARY TO ACHIEVE A SUSTAINED ACTION, A POWDERED DRUG HAVING SUBSTANTIALLY NEUTRAL TO ACID CHARACTERISTICS IN AN AQUEOUS MEDIUM WITH A WATER-INSOLUBLE, UNSTEAMED, ACID CARBOXY VINYL POLYMER OF ACRYLIC ACID COPOLYMERIZED WITH ABOUT 0.75 TO 2% OF POLYALKENYL POLYESTER IN A WEIGHT RATIO OF POLYMER TO DRUG FROM ABOUT 0.5:1 TO ABOUT 100:1, AND THEN COMPRESSING THE INTIMATELY MIXED INGREDIENTS TO FORM TABLETS FOR ORAL MEDICATION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |