Patent US3665073A successfully refreshed from Google Patents.
US3665073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pharmaceuticals prepared from polycyclic bases and cation exchange resins
Assignee: Novartis Corp
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Filing: 1968-08-08
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Granted: 1972-05-23
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Expires: 1988-08-08
Abstract
Abstract Pharmaceutical compositions suitable for oral administration are prepared from non-ionisable polycyclic bases, an ion-exchange resin containing carboxylic acid groups and a pharmaceutically acceptable carrier liquid. These compositions are used for producing an anti-depressant effect in mammals. A typical embodiment is a composition containing imipramine and Zeo-Karb 226.
Inventors
- 👤 Alan Marshall
- 👤 Anne Wilson Macpherson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:12
CPC Classifications
A; A61; A61K; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58; A61K47/585
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
The composition of claim 1 wherein said polymeric cation exchange resin is polymethacrylic acid having a degree of crosslinkage of about 4.5 percent, and the amount of free base is from about 20 to about 30 percent, weight by weight, of said resin.
Claim 2
Dependent Claim
27 words
The method of producing an anti-depressant effect in a mammal comprising administering orally to said mammal a therapeutically effective amount of the pharmaceutical composition of claim 1.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |