Patent US1756007A successfully refreshed from Google Patents.
US1756007A
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US
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Process for treating mixtures of oxy salts of arsenic, antimony, and tin
Assignee: American Smelting and Refining Co
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Filing: 1927-01-20
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Granted: 1930-04-22
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Expires: 1947-01-20
Abstract
No abstract record available.
Inventors
- 👤 Perkins Melville Fletcher
- 👤 Charles W Hanson
- 👤 O'harra Berry Marvel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:28
CPC Classifications
C; C22; C22B; C22B3/00; 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) | 1933-04-21 | 1933-10-21 | 1934-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-21 | 1937-10-21 | 1938-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-21 | 1941-10-21 | 1942-04-22 | $7700.00 | Window Closed / Lapsed |