US3557279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microencapsulation form of an anti-inflammatory drug
Assignee: Merck and Co Inc
•
Filing: 1969-06-12
•
Granted: 1971-01-19
•
Expires: 1989-06-12
Abstract
Abstract THE ANTI-INFLAMMATORY DRUG INDOMETHACIN IS MICROENCAPSULATED BY THE METHOD OF POLYMER/POLYMER INCOMPATIBILITY, COACERVATION USING EITHER AN ETHYLCELLULOSE-POLYETHYLENE SYSTEM OR A GELATIN-GUM ARABIC SYSTEM.
Inventors
- 👤 Lewis D Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:58
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/40; A61K31/403; A61K31/404; A61K31/405; A61K9/00; A61K9/48; A61K9/50; A61K9/5084; A61K9/5089; B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |