Patent US1880747A successfully refreshed from Google Patents.
US1880747A
Expired / Lapsed
US
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Cooling system for fluid-actuated turbines
Assignee: Individual
•
Filing: 1927-10-27
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Granted: 1932-10-04
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Expires: 1947-10-27
Abstract
No abstract record available.
Inventors
- 👤 Bowen William Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:56
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08
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) | 1935-10-04 | 1936-04-04 | 1936-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-10-04 | 1940-04-04 | 1940-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-10-04 | 1944-04-04 | 1944-10-04 | $7700.00 | Window Closed / Lapsed |