US1756092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of refining nickel-copper matte
Assignee: Individual
•
Filing: 1928-12-13
•
Granted: 1930-04-29
•
Expires: 1948-12-13
Abstract
No abstract record available.
Inventors
- 👤 Lathe Frank Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:37
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/02; C22B23/025; C22B15/00; C22B15/0063; C22B15/0084; C22B23/04; C22B23/0407; C22B23/0415; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1933-04-28 | 1933-10-28 | 1934-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-28 | 1937-10-28 | 1938-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-28 | 1941-10-28 | 1942-04-29 | $7700.00 | Window Closed / Lapsed |