US2087834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid impeller and turbine
Assignee: Individual
•
Filing: 1932-05-23
•
Granted: 1937-07-20
•
Expires: 1952-05-23
Abstract
No abstract record available.
Inventors
- 👤 Chester W Brown
- 👤 Erwin F Dosie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:01
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/16; F04D17/161; F01; F01D; F01D1/00; F01D1/34; F01D1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-07-19 | 1941-01-18 | 1941-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-07-19 | 1945-01-18 | 1945-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-07-19 | 1949-01-18 | 1949-07-20 | $7700.00 | Window Closed / Lapsed |