Patent US3788025A successfully refreshed from Google Patents.
Patent US2557210A successfully refreshed from Google Patents.
US2557210A
Expired / Lapsed
US
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Draft controlling and back draft
Assignee: —
•
Filing: —
•
Granted: 1951-06-19
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Expires: 1968-06-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:31
CPC Classifications
F; F23; F23M; F23M9/00; F23M9/003; F23M9/006; F23J; F23J11/00; F23L; F23L11/00; F23L13/00; F23L13/02; F23L3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |