US2400041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of tertiary organic hydroperoxides with formaldehyde
Assignee: Shell Development Co
•
Filing: 1944-08-15
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Granted: 1946-05-07
•
Expires: 1964-08-15
Abstract
No abstract record available.
Inventors
- 👤 Frank H Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:07
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/20; C08; C08F; C08F4/00; C08F4/28; C08F4/32; Y; Y10; Y10S; Y10S260/00; Y10S260/28
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) | 1949-05-06 | 1949-11-05 | 1950-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-05-06 | 1953-11-05 | 1954-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-05-06 | 1957-11-05 | 1958-05-07 | $7700.00 | Window Closed / Lapsed |