US2349267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acylated derivative of vitamin b6 and process of preparing the same
Assignee: Merck and Co Inc
•
Filing: 1940-11-02
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Granted: 1944-05-23
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Expires: 1960-11-02
Abstract
No abstract record available.
Inventors
- 👤 Stanton A Harris
- 👤 Eric T Stiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:21
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/63; C07D213/65; C07D213/66; C07D213/67
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) | 1947-05-23 | 1947-11-22 | 1948-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-05-23 | 1951-11-22 | 1952-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-05-23 | 1955-11-22 | 1956-05-23 | $7700.00 | Window Closed / Lapsed |