US3426852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller structure
Assignee: Individual
•
Filing: 1967-03-13
•
Granted: 1969-02-11
•
Expires: 1987-03-13
Abstract
No abstract record available.
Inventors
- 👤 Lewis R Kinsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:30
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US352394A
Cited
US573963A
Cited
US897738A
Cited
US1058790A
Cited
US1738994A
Cited
FR924207A
Cited
US2980667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |