US3522309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reductive alkylation process for production of n-alkylated amines
Assignee: EIDP Inc
•
Filing: 1967-08-31
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Granted: 1970-07-28
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Expires: 1987-08-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur Francis Kirby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:08
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/24; C07C209/26; C07C209/30; C07C209/32; C07C209/36; C07C211/00; C07C211/43; C07C211/44; C07C211/45; C07C211/46
Claims Analysis
Total Claims: 0
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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) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |