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Patent US2448368A successfully refreshed from Google Patents.
US2448368A
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Organic acid synthesis
Assignee: EIDP Inc
•
Filing: 1945-11-19
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Granted: 1948-08-31
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Expires: 1965-11-19
Abstract
No abstract record available.
Inventors
- 👤 William F Gresham
- 👤 Richard E Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:35
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/49; C07C51/00; C07C51/10; C07C51/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB335551A
Cited
US1957939A
Cited
US2000053A
Cited
US1924763A
Cited
US2079216A
Cited
US2135459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |