Patent US1559342A successfully refreshed from Google Patents.
US1559342A
Expired / Lapsed
US
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Method of and apparatus for purifying molten metal
Assignee: Individual
•
Filing: 1925-08-21
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Granted: 1925-10-27
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Expires: 1945-08-21
Abstract
No abstract record available.
Inventors
- 👤 Mattice Royal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:13
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/36; F; F27; F27B; F27B14/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12222
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) | 1928-10-26 | 1929-04-27 | 1929-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-10-26 | 1933-04-27 | 1933-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-10-26 | 1937-04-27 | 1937-10-27 | $7700.00 | Window Closed / Lapsed |