US2819675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller pump or blower
Assignee: Worthington Corp
•
Filing: 1953-08-18
•
Granted: 1958-01-14
•
Expires: 1973-08-18
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Gilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:51
CPC Classifications
F; F04; F04D; F04D15/00; F04D27/00; F04D27/009; F04D29/00; F04D29/18; F04D29/181; F04D9/00; F04D9/004; F04D9/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1261457A
Cited
US2277868A
Cited
FR900439A
Cited
US2418801A
Cited
US2380606A
Cited
US2520697A
Cited
US2379133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |