US2196581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of organic acids from alcohols
Assignee: Dow Chemical Co
•
Filing: 1938-09-15
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Granted: 1940-04-09
•
Expires: 1958-09-15
Abstract
No abstract record available.
Inventors
- 👤 Wilbur T Stephenson
- 👤 Earl L Pelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:25
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/41; C07C29/00; C07C31/00; C07C31/02; C07C31/125
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) | 1943-04-09 | 1943-10-09 | 1944-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-09 | 1947-10-09 | 1948-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-09 | 1951-10-09 | 1952-04-09 | $7700.00 | Window Closed / Lapsed |