US3290004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for damping vibration of long steam-turbine blades
Assignee: Hitachi Ltd
•
Filing: 1966-04-07
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Granted: 1966-12-06
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Expires: 1986-04-07
Abstract
No abstract record available.
Inventors
- 👤 Ishibashi Eiichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:28
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/141; F01D5/145; F01D25/00; F01D25/32; F01D5/22; F01D5/225; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |