Patent US2793852A successfully refreshed from Google Patents.
US2793852A
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US
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Metal chip melting apparatus
Assignee: NL Industries Inc
•
Filing: 1951-03-19
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Granted: 1957-05-28
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Expires: 1971-03-19
Abstract
No abstract record available.
Inventors
- 👤 Harrison George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:23
CPC Classifications
F; F27; F27B; F27B14/00; F27B14/08; F27B14/14; Y; Y10; Y10S; Y10S266/00; Y10S266/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US969253A
Cited
US2072650A
Cited
US2035282A
Cited
US2181148A
Cited
US2300141A
Cited
US2493391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |