US2637489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower wheel construction
Assignee: Individual
•
Filing: 1949-02-19
•
Granted: 1953-05-05
•
Expires: 1969-02-19
Abstract
No abstract record available.
Inventors
- 👤 Charles I Place
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:30
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/282; F04D29/283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1700017A
Cited
US1020771A
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US1131555A
Cited
US1378008A
Cited
GB225640A
Cited
US2350739A
Cited
US2357618A
Cited
US2392113A
Cited
US2443411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |