US3423329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing acrolein and methacrolein
Assignee: Roehm GmbH Darmstadt
•
Filing: 1965-05-28
•
Granted: 1969-01-21
•
Expires: 1985-05-28
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Gruber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:25
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/31; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J27/192; C07C45/35
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |