US2499067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined forged draft and convec
Assignee: —
•
Filing: —
•
Granted: 1950-02-28
•
Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:23
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US805247A
Cited
US1169448A
Cited
US2015195A
Cited
US2001531A
Cited
US2041870A
Cited
GB446430A
Cited
US2348127A
Cited
US2263362A
Cited
US2304570A
Cited
US2337676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |