US3501531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroformylation process
Assignee: Ethyl Corp
•
Filing: 1965-12-15
•
Granted: 1970-03-17
•
Expires: 1985-12-15
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:11
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/0006; C07F15/0073; C07F15/008; B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/14; C07C29/141; C07C29/17; C07C29/172; C07C45/00; C07C45/49; C07C45/50; C07C5/00; C07C5/02; C07C5/03; C07C5/08; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C5/2562; C07C5/2593; C07C2531/00; C07C2531/16; C07C2531/22; C07C2531/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2880241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |