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US885174A
Expired / Lapsed
US
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Propeller-wheel.
Assignee: FREDERICK L PERKINS
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Filing: 1906-09-22
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Granted: 1908-04-21
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Expires: 1926-09-22
Abstract
No abstract record available.
Inventors
- 👤 Harry J Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:59
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/38; F04D29/384; B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/26
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) | 1911-04-21 | 1911-10-21 | 1912-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-04-21 | 1915-10-21 | 1916-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-04-21 | 1919-10-21 | 1920-04-21 | $7700.00 | Window Closed / Lapsed |