Patent US1242478A successfully refreshed from Google Patents.
Patent US2071258A successfully refreshed from Google Patents.
US2071258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary blower and the like
Assignee: Individual
•
Filing: 1935-02-27
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Granted: 1937-02-16
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Expires: 1955-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jr James Haydock
- 👤 Haythorn John
- 👤 Shorrock Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:17
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/352; F04C18/00; F04C18/30; F04C18/34; F04C18/344; F04C18/352
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) | 1940-02-16 | 1940-08-17 | 1941-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-16 | 1944-08-17 | 1945-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-16 | 1948-08-17 | 1949-02-16 | $7700.00 | Window Closed / Lapsed |