US3767803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable aqueous pyritinol solutions
Assignee: Merck Patent GmbH
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Filing: 1971-09-24
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Granted: 1973-10-23
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Expires: 1991-09-24
Abstract
Abstract AQUEOUS SOLUTIONS OF BIS(3-HYDROXY-4-HYDROXYMETHYL2-METHYL-PYRIDY-(5)-METHYL) -DISULFIDE(PYRITINOL) ARE STABILIZED BY A MIXTURE OF (A) A PHYSIOLOGICALLY ACCEPTABLE ACID OF 1-6 CARBON ATOMS AND (B) VITAMIN B1, VITAMIN B6, DIETHANOLAMINE, 1-BENZYL-3-ETHYL-6,7-DIMETHOXYISOQUINOLINE, NICOTINIC ACID AMIDE OR OTHER PHYSIOLOGICALLY ACCEPTABLE BASE.
Inventors
- 👤 E Nuernberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:59
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0019; A61K31/00; A61K31/33; A61K31/395; A61K31/435; A61K31/44
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |