US2559831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan construction
Assignee: Individual
•
Filing: 1946-10-09
•
Granted: 1951-07-10
•
Expires: 1966-10-09
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Roffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:46
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1121335A
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US1142530A
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GB116463A
Cited
US1372414A
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US1847666A
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US2091158A
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US2155611A
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US2139630A
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GB492801A
Cited
US2240597A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |