US2418173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of diketones
Assignee: Shell Development Co
•
Filing: 1944-07-18
•
Granted: 1947-04-01
•
Expires: 1964-07-18
Abstract
No abstract record available.
Inventors
- 👤 Vernon E Haury
- 👤 Seaver A Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:29
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/04; C07C49/12; C07C45/00; C07C45/42; C07C45/51; C07C45/516; C07C49/14; C07C49/385; C07C49/403; C07C49/76; C07C49/782; C07C49/784
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) | 1950-03-31 | 1950-09-30 | 1951-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-31 | 1954-09-30 | 1955-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-31 | 1958-09-30 | 1959-04-01 | $7700.00 | Window Closed / Lapsed |