Patent US2220385A successfully refreshed from Google Patents.
US2220385A
Expired / Lapsed
US
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Metallurgical flux and method of producing it
Assignee: MAHONING MINING Co
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Filing: 1940-03-04
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Granted: 1940-11-05
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Expires: 1960-03-04
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Abbott
- 👤 Carl O Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:20
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/10; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C22B1/243; Y; Y10; Y10S; Y10S106/00; Y10S106/04
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) | 1943-11-05 | 1944-05-06 | 1944-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-05 | 1948-05-06 | 1948-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-05 | 1952-05-06 | 1952-11-05 | $7700.00 | Window Closed / Lapsed |