Patent US3710237A successfully refreshed from Google Patents.
Patent US1932518A successfully refreshed from Google Patents.
US1932518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making primary amino compounds
Assignee: Dow Chemical Co
•
Filing: 1928-08-31
•
Granted: 1933-10-31
•
Expires: 1948-08-31
Abstract
No abstract record available.
Inventors
- 👤 William J Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/06; C07C209/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-10-30 | 1937-05-01 | 1937-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-10-30 | 1941-05-01 | 1941-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-10-30 | 1945-05-01 | 1945-10-31 | $7700.00 | Window Closed / Lapsed |