US3278536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrimethamine salt with 2, 6-dihydroxyisonicotinic acid
Assignee: Parke Davis and Co LLC
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Filing: 1965-09-10
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Granted: 1966-10-11
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Expires: 1985-09-10
Abstract
Abstract The invention comprises salts of the pyrimidine of formula <FORM:0986812/C2/1> with pamoic acid of formula <FORM:0986812/C2/2> and with citrazinic acid of formula <FORM:0986812/C2/3> the salts are prepared by reaction of the components or salts thereof in a solvent. Pharmaceutical compositions containing the above pyrimethamine salts are mentioned for parenteral administration (as suspensions) against malaria. Reference has been directed by the Comptroller to Specification 715,813.
Inventors
- 👤 Edward F Elslager
- 👤 Donald F Worth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:01
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/01; C07C65/105; C07C65/11; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/48; Y; Y02; Y02A; Y02A50/00; Y02A50/30
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |