US2497125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for melting metals and alloys
Assignee: Airco Inc
•
Filing: 1946-10-01
•
Granted: 1950-02-14
•
Expires: 1966-10-01
Abstract
No abstract record available.
Inventors
- 👤 Philip M Hulme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:06
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/02; F27B14/00; F27B14/08; F27B14/14; F27B14/143; F27B7/20; F27B7/42; F27B14/02; F27B2014/0843; Y; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1808145A
Cited
US2215079A
Cited
US2215080A
Cited
US2215081A
Cited
US2265284A
Cited
US2331887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |