US3000446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rotor blades
Assignee: Studebaker Packard Corp
•
Filing: 1958-08-25
•
Granted: 1961-09-19
•
Expires: 1978-08-25
Abstract
No abstract record available.
Inventors
- 👤 Elmer P Warnken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:36
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0025; B29D99/0028; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473; B64C2027/4733; B64C2027/4736
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB148796A
Cited
US1846256A
Cited
US2056563A
Cited
US2189785A
Cited
US2428325A
Cited
US2417586A
Cited
US2485827A
Cited
US2606728A
Cited
US2482798A
Cited
US2566701A
Cited
US2588570A
Cited
US2630868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |