US2084394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of refining metals
Assignee: American Metal Co Ltd
•
Filing: 1935-02-08
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Granted: 1937-06-22
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Expires: 1955-02-08
Abstract
No abstract record available.
Inventors
- 👤 Max F W Heberlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:35
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/0056; C22B15/0002; C22B15/001; C22B15/0013; C22B15/0015; C22B15/0063; C22B15/0065; C22B15/0067; C22B15/0071; C22B15/008; C22B15/0084; C22B15/0089; 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) | 1940-06-21 | 1940-12-21 | 1941-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-21 | 1944-12-21 | 1945-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-21 | 1948-12-21 | 1949-06-22 | $7700.00 | Window Closed / Lapsed |