US2200488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast furnace construction
Assignee: FREYN ENGINEERING Co
•
Filing: 1938-08-17
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Granted: 1940-05-14
•
Expires: 1958-08-17
Abstract
No abstract record available.
Inventors
- 👤 Willis B Clemmitt
- 👤 Jr John C Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:24
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/18; F; F27; F27B; F27B1/00; F27B1/10; F27B1/20; F27D; F27D19/00; F27D3/00; F27D3/0033; F27D3/10; F27D2019/0006; F27D2019/0009
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) | 1943-05-14 | 1943-11-13 | 1944-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-14 | 1947-11-13 | 1948-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-14 | 1951-11-13 | 1952-05-14 | $7700.00 | Window Closed / Lapsed |