US2543976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing tablets of sodium gentisate dihydrate
Assignee: F Hoffmann La Roche AG
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Filing: 1948-08-07
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Granted: 1951-03-06
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Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
- 👤 Lauter Werner Maximillian
- 👤 Brucar Marcel David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:39
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/14; A61K9/16; A61K9/20; A61K9/2095
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
22 words
A PROCESS OF PREPARING SODIUM GENTISATE DIHYDRATE WHICH COMPRISES TREATING SODIUM GENTISATE PENTAHYDRATE WITH A SOLVENT WHICH FORMS AN AZEOTROPE WITH WATER.
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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |