US2541233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel for window ventilators
Assignee: W W WELCH Co
•
Filing: 1947-12-17
•
Granted: 1951-02-13
•
Expires: 1967-12-17
Abstract
No abstract record available.
Inventors
- 👤 Alfred F Fukal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:58
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/007; F24F7/013; F24F13/00; F24F13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1698328A
Cited
US1699751A
Cited
US1866154A
Cited
US2008965A
Cited
US2165650A
Cited
US2441737A
Cited
US2448671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |