Patent US2374503A successfully refreshed from Google Patents.
US2374503A
Expired / Lapsed
US
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Production of riboflavin by biochemical methods
Assignee: Commercial Solvents Corp
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Filing: 1942-11-12
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Granted: 1945-04-24
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Expires: 1962-11-12
Abstract
No abstract record available.
Inventors
- 👤 Frank J Rudert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:53
CPC Classifications
C; C12; C12P; C12P25/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911
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) | 1948-04-23 | 1948-10-23 | 1949-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-23 | 1952-10-23 | 1953-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-23 | 1956-10-23 | 1957-04-24 | $7700.00 | Window Closed / Lapsed |