US2269935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing hydroxy aldehydes and hydroxy ketones
Assignee: EIDP Inc
•
Filing: 1940-02-27
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Granted: 1942-01-13
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Expires: 1960-02-27
Abstract
No abstract record available.
Inventors
- 👤 William E Hanford
- 👤 Richard S Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:55
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/75; C07C29/00; C07C29/132; C07C29/136; C07C29/14; C07C29/141; C07C29/143; C07C29/145; C07C29/36; C07C29/38
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) | 1945-01-12 | 1945-07-14 | 1946-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-12 | 1949-07-14 | 1950-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-12 | 1953-07-14 | 1954-01-13 | $7700.00 | Window Closed / Lapsed |