US2574740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated blast cupola
Assignee: Meehanite Metal Corp
•
Filing: 1948-02-11
•
Granted: 1951-11-13
•
Expires: 1968-02-11
Abstract
No abstract record available.
Inventors
- 👤 Chester A Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:19
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/22; Y; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US365395A
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US2078747A
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US2146872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |