US2159286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction furnace
Assignee: PITTSBURGH RES CORP
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Filing: 1935-09-25
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Granted: 1939-05-23
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Expires: 1955-09-25
Abstract
No abstract record available.
Inventors
- 👤 William E Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:39
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/30; F27D17/304; C; C22; C22B; C22B4/00; C22B4/08; F27B; F27B3/00; F27B3/10
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) | 1942-05-22 | 1942-11-21 | 1943-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-22 | 1946-11-21 | 1947-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-22 | 1950-11-21 | 1951-05-23 | $7700.00 | Window Closed / Lapsed |