US2538739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing for fan and motor
Assignee: Joy Manufacturing Co
•
Filing: 1946-03-27
•
Granted: 1951-01-16
•
Expires: 1966-03-27
Abstract
No abstract record available.
Inventors
- 👤 Theodor H Troller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:03
CPC Classifications
F; F04; F04D; F04D19/00; F04D19/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1762358A
Cited
US1762359A
Cited
US1926113A
Cited
US2108703A
Cited
GB454072A
Cited
US2169234A
Cited
US2314058A
Cited
US2400711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |