Patent US1508243A successfully refreshed from Google Patents.
US1508243A
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US
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Treatment of refined copper from copper oxide
Assignee: METALS PRODUCTION Co OF N
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Filing: 1923-03-27
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Granted: 1924-09-09
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Expires: 1943-03-27
Abstract
No abstract record available.
Inventors
- 👤 Perkins Walter George
- 👤 Beasley Walter Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:19
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0002; C22B15/001; C22B15/0021; C22B15/0026; C22B15/006; C22B15/0063; C22B15/0065; C22B15/0078; 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) | 1927-09-09 | 1928-03-10 | 1928-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-09-09 | 1932-03-10 | 1932-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-09-09 | 1936-03-10 | 1936-09-09 | $7700.00 | Window Closed / Lapsed |