Patent US2079872A successfully refreshed from Google Patents.
US2079872A
Expired / Lapsed
US
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Apparatus for the conversion of metal
Assignee: Individual
•
Filing: 1936-07-25
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Granted: 1937-05-11
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Expires: 1956-07-25
Abstract
No abstract record available.
Inventors
- 👤 Robert S Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:01
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4653; F; F27; F27D; F27D3/00; F27D3/14; F27D3/15; F27D3/1545; F27D3/159
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) | 1940-05-10 | 1940-11-09 | 1941-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-05-10 | 1944-11-09 | 1945-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-05-10 | 1948-11-09 | 1949-05-11 | $7700.00 | Window Closed / Lapsed |