US2385283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of itaconic acid
Assignee: Pfizer Inc
•
Filing: 1942-11-25
•
Granted: 1945-09-18
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Expires: 1962-11-25
Abstract
No abstract record available.
Inventors
- 👤 Jasper H Kane
- 👤 Alexander C Finlay
- 👤 Philip F Amann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:46
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P7/44; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/913
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) | 1948-09-17 | 1949-03-19 | 1949-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-09-17 | 1953-03-19 | 1953-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-09-17 | 1957-03-19 | 1957-09-18 | $7700.00 | Window Closed / Lapsed |