US2046937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of copper compounds from metallic copper
Assignee: Individual
•
Filing: 1933-08-11
•
Granted: 1936-07-07
•
Expires: 1953-08-11
Abstract
No abstract record available.
Inventors
- 👤 Leo P Curtin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:08
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/04; C01G3/05; C01G3/02; C01G3/06; C01G3/10; C01P; C01P2006/00; C01P2006/60
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) | 1939-07-07 | 1940-01-06 | 1940-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-07 | 1944-01-06 | 1944-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-07 | 1948-01-06 | 1948-07-07 | $7700.00 | Window Closed / Lapsed |