US2150140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of ascorbic acid having an antiscorbutic action and process for the manufacture of same
Assignee: F Hoffmann La Roche AG
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Filing: 1938-02-08
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Granted: 1939-03-07
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Expires: 1958-02-08
Abstract
No abstract record available.
Inventors
- 👤 Warnat Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:01
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/62; A; A61; A61K; A61K31/00; A61K31/33; A61K31/335; A61K31/365; A61K31/375
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) | 1942-03-06 | 1942-09-05 | 1943-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-06 | 1946-09-05 | 1947-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-06 | 1950-09-05 | 1951-03-07 | $7700.00 | Window Closed / Lapsed |