Patent US660250A successfully refreshed from Google Patents.
Patent US1968443A successfully refreshed from Google Patents.
US1968443A
Expired / Lapsed
US
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Means for heating metal for rolling
Assignee: Individual
•
Filing: 1932-07-02
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Granted: 1934-07-31
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Expires: 1952-07-02
Abstract
No abstract record available.
Inventors
- 👤 Emerson L Clark
- 👤 Earl W Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:45
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/02; F27B9/028; F27B9/06; F27B9/062; F27B9/30; F27B9/38; F27B9/14; F27B9/20; F27B9/22; F27D; F27D3/00; F27D2003/0034; F27D2003/0046; F27D2003/0068; F27D99/00; F27D99/0001; F27D99/0006; F27D2099/0025; F27D21/00; F27D21/0014; F27M; F27M2001/00; F27M2001/15; F27M2001/1539; F27M2001/1547; F27M2001/1552; F27M2003/00; F27M2003/02
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) | 1937-07-30 | 1938-01-29 | 1938-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-30 | 1942-01-29 | 1942-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-30 | 1946-01-29 | 1946-07-31 | $7700.00 | Window Closed / Lapsed |