US2273643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic preparation of yellow cuprous oxide
Assignee: Rohm and Haas Co
•
Filing: 1938-12-10
•
Granted: 1942-02-17
•
Expires: 1958-12-10
Abstract
No abstract record available.
Inventors
- 👤 Loren C Hurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:21
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/02; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/60
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) | 1945-02-16 | 1945-08-18 | 1946-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-02-16 | 1949-08-18 | 1950-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-02-16 | 1953-08-18 | 1954-02-17 | $7700.00 | Window Closed / Lapsed |