US3501251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch propeller
Assignee: Metso Fiber Karlstad AB
•
Filing: 1968-01-24
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Granted: 1970-03-17
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Expires: 1988-01-24
Abstract
No abstract record available.
Inventors
- 👤 Kiell Haglund
- 👤 Olof Johan Gerhard Hedberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:20
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/06; B63H3/08; B63H3/081; B63H3/082; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/40; F; F03; F03B; F03B3/00; F03B3/12; F03B3/14; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR789794A
Cited
FR1083482A
Cited
FR1256667A
Cited
US3163231A
Cited
US3150570A
Cited
US3212586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |