US2801073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow sheet metal blade or vane construction
Assignee: RTX Corp
•
Filing: 1952-06-30
•
Granted: 1957-07-30
•
Expires: 1972-06-30
Abstract
No abstract record available.
Inventors
- 👤 Francis C Savage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:51
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F01D5/188; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA482704A
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FR750028A
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CH229933A
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FR891635A
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GB584580A
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US2447095A
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GB602530A
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US2613910A
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US2553078A
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US2559131A
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FR1007303A
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US2642263A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |