US2065547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treatment of pyritic materials
Assignee: Individual
•
Filing: 1934-10-20
•
Granted: 1936-12-29
•
Expires: 1954-10-20
Abstract
No abstract record available.
Inventors
- 👤 Craig R Arnold
- 👤 Frank N Moerk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:51
CPC Classifications
C; C22; C22B; C22B11/00; C22B15/00; C22B15/0002; C22B15/001; C22B15/0013; C22B15/0063; C22B15/0065; C22B15/0067; C22B15/0071; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1939-12-29 | 1940-06-29 | 1940-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-12-29 | 1944-06-29 | 1944-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-12-29 | 1948-06-29 | 1948-12-29 | $7700.00 | Window Closed / Lapsed |