Patent US3402203A successfully refreshed from Google Patents.
US3402203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing n, n-dimethylamino alcohols
Assignee: Commercial Solvents Corp
•
Filing: 1964-11-19
•
Granted: 1968-09-17
•
Expires: 1984-11-19
Abstract
No abstract record available.
Inventors
- 👤 John B Tindall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:18
CPC Classifications
C; C07; C07C; C07C213/00; C07C213/08; C07C215/00; C07C215/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3091640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |