Patent US1427307A successfully refreshed from Google Patents.
US1427307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller
Assignee: Individual
•
Filing: 1918-11-25
•
Granted: 1922-08-29
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Expires: 1938-11-25
Abstract
No abstract record available.
Inventors
- 👤 Roy C Makenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:43
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/26; B64; B64C; B64C11/00; B64C11/16
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) | 1925-08-28 | 1926-02-27 | 1926-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-08-28 | 1930-02-27 | 1930-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-08-28 | 1934-02-27 | 1934-08-29 | $7700.00 | Window Closed / Lapsed |