Patent US1428041A successfully refreshed from Google Patents.
US1428041A
Expired / Lapsed
US
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Process for the separation and recovery of metals from metal alloys
Assignee: Individual
•
Filing: 1920-09-21
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Granted: 1922-09-05
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Expires: 1940-09-21
Abstract
No abstract record available.
Inventors
- 👤 Kroll Guillaume Justine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:32
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/001; C22B7/004; C22B13/00; C22B13/06; C22B5/00; C22B5/02; C22B5/04; C22B9/00; C22B9/10; 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) | 1925-09-04 | 1926-03-06 | 1926-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-09-04 | 1930-03-06 | 1930-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-09-04 | 1934-03-06 | 1934-09-05 | $7700.00 | Window Closed / Lapsed |