US3437728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protracted release pharmaceutical compositions
Assignee: Diwag Chemische Fabriken GmbH
•
Filing: 1964-06-15
•
Granted: 1969-04-08
•
Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Gerhard Renwanz
- 👤 Karl Credner
- 👤 Erika Glantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:07
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2813; A61K9/2004; A61K9/2013; A61K9/282; A61K9/2833; A61K9/286; A61K9/2866
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2738303A
Cited
US2853420A
Cited
US2897121A
Cited
US2991226A
Cited
US2928770A
Cited
US3081233A
Cited
US3080294A
Cited
US3383283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |