US2175585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of furfurylamines
Assignee: Individual
•
Filing: 1936-04-14
•
Granted: 1939-10-10
•
Expires: 1956-04-14
Abstract
No abstract record available.
Inventors
- 👤 Adkins Homer
- 👤 Charles F Winans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:04
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/52
Claims Analysis
Total Claims: 0
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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) | 1942-10-09 | 1943-04-10 | 1943-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-09 | 1947-04-10 | 1947-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-09 | 1951-04-10 | 1951-10-10 | $7700.00 | Window Closed / Lapsed |