US3420827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making 4,4-dimethyl-3-butenyl methyl ketones,intermediates therefor and the said intermediates
Assignee: SCM Corp
•
Filing: 1965-12-10
•
Granted: 1969-01-07
•
Expires: 1985-12-10
Abstract
No abstract record available.
Inventors
- 👤 John C Leffingwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:28
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/14; C07D295/145; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/673; C07C45/676
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3305562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |