US2538092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble sulfaquinoxaline tablet
Assignee: Merck and Co Inc
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Filing: 1949-03-04
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Granted: 1951-01-16
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Expires: 1969-03-04
Abstract
No abstract record available.
Inventors
- 👤 Walter C Gakenheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:56
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2072; A61K9/2077
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
A DISINTEGRABLE, WATER-SOLUBLE SULFAQUINOXALINE TABLET COMPRISING A HETEROGENEOUS MIXTURE OF TWO TYPES OF GRANULES OF SUBSTANTIALLY UNIFORM SIZE AND A FINELY DIVIDED SOLID LUBRICANT INTERSPERSED BETWEEN SAID GRANULES, AND GRANULES OF ONE TYPE CONSISTING OF A REACTED MIXTURES OF SULFAQUINOXALINE AND AN EXCESS OF AN ALKALI METAL CARBONATE AND THE GRANULES OF THE SECOND TYPE CONSISTING OF AN ALKALI METAL SULFOCARBOLATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |