US3642986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aspirin-charcoal compositions
Assignee: Individual
•
Filing: 1970-04-01
•
Granted: 1972-02-15
•
Expires: 1990-04-01
Abstract
Abstract ASPIRIN, WHICH IS UNSTABLE AND DECOMPOSES IN THE PRESENCE OF ACTIVATED CHARCOAL, IS STABILIZED BY CONVERTING THE ASPIRIN TO ITS ALUMINUM SALT. THERAPEUTICALLY USEFUL AND STABLE COMPOSITION COMPRISING ASPIRIN AND ACTIVATED CHARCOAL ARE PROVIDED.
Inventors
- 👤 William Arthur Welch
- 👤 Fritz Peter Kohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:25
CPC Classifications
A; A61; A61K; A61K33/00; A61K33/44
Claims Analysis
Total Claims: 0
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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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |