Patent US875708A successfully refreshed from Google Patents.
US875708A
Expired / Lapsed
US
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Ventilator.
Assignee: OHIO BLOWER Co
•
Filing: 1907-04-06
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Granted: 1908-01-07
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Expires: 1927-04-06
Abstract
No abstract record available.
Inventors
- 👤 Malcolm Hard
- 👤 Edward Coney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:21
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02
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) | 1911-01-06 | 1911-07-08 | 1912-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-01-06 | 1915-07-08 | 1916-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-01-06 | 1919-07-08 | 1920-01-07 | $7700.00 | Window Closed / Lapsed |