US3826666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enteric capsules
Assignee: Parke Davis and Co LLC
•
Filing: 1972-07-20
•
Granted: 1974-07-30
•
Expires: 1992-07-20
Abstract
Abstract PHARMACEUTICAL CAPSULES HAVING ENTERIC PROPERTIES ARE FORMED FROM A HOMOGENEOUS COMPOSITION COMPRISING GELATIN AND AN ALKALI METAL SALT OF NYDROXYPROPYL METHYLCELLULOSE PHTHALATE, OPTIONALLY WITH THE INCLUSION OF A PLASTICIZER AND/OR A COLORING AGENT. THE CAPSULES ARE SOLUBLE IN OR DISINTEGRATED BY THE ALKALINE INTESTINAL SECRETIONS BUT ARE SUBSTANTIALLY INSOLUBLE OR RESISTANT TO SOLUTION IN THE ACID SECRETIONS OF THE STOMACH.
Inventors
- 👤 M Hirai
- 👤 T Sagamihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:03
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/4816; Y; Y10; Y10S; Y10S206/00; Y10S206/828
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |