US3080346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained-release pharmaceutical preparations
Assignee: Bayer AG
•
Filing: 1959-10-09
•
Granted: 1963-03-05
•
Expires: 1979-10-09
Abstract
No abstract record available.
Inventors
- 👤 Schellenberg Wolf-Dietrich
- 👤 Kramer Helmut
- 👤 Bartl Herbert
- 👤 Hofer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/284; A61K9/2846; A61K9/48; A61K9/50; A61K9/5005; A61K9/5021; A61K9/5026; Y; Y10; Y10S; Y10S526/00; Y10S526/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A COATING COMPOSITION FOR IMPARTING GASTRIC STABILITY AND ENTERIC SOLUBILITY TO ORAL PHARMACEUTICAL AGENTS, THAT COMPRISES A TERNARY COPOLYMER OF STYRENE, METHACRYLIC ACID, AND THE BUTYL HALF-ESTER OF MALEIC ACID.
Claim 2
Dependent Claim
30 words
A COATING COMPOSITION FOR IMPARTING GASTRIC STABILITY AND ENTERIC SOLUBILITY TO ORAL PHARMACEUTICAL AGENTS, THAT COMPRISES A TERNARY COPOLYMER OF STYRENE, METHACRYLIC ACID, AND THE BUTYL HALF-ESTER OF MALEIC ACID.
References Cited (Backward Citations)
US2537018A
Cited
US2798062A
Cited
US2717247A
Cited
US2963452A
Cited
US2897121A
Cited
US2985611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |