US3300531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing dimethylacetamide
Assignee: EIDP Inc
•
Filing: 1963-10-04
•
Granted: 1967-01-24
•
Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
- 👤 Jr John A James
- 👤 Charles J Kramis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:07
CPC Classifications
C; C07; C07C; C07C231/00; C07C231/02; C07C233/00; C07C233/01; C07C233/02; C07C233/04; C07C233/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2667511A
Cited
US2667451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |