US2321748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of mixtures of methanol and butyraldehyde
Assignee: EIDP Inc
•
Filing: 1940-05-04
•
Granted: 1943-06-15
•
Expires: 1960-05-04
Abstract
No abstract record available.
Inventors
- 👤 John H Hopkins
- 👤 Barnard M Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:07
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/02; C07C31/04; C07C45/00; C07C45/78; C07C45/81; C07C45/82; C07C45/83; Y; Y10; Y10S; Y10S203/00; Y10S203/11; Y10S203/24
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) | 1946-06-14 | 1946-12-14 | 1947-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-06-14 | 1950-12-14 | 1951-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-06-14 | 1954-12-14 | 1955-06-15 | $7700.00 | Window Closed / Lapsed |