US3606580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow airfoil members
Assignee: Cyclops Corp
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Filing: 1969-09-10
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Granted: 1971-09-20
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Expires: 1989-09-10
Abstract
Abstract A HOLLOW AIRFOIL MEMBER COMPRISING AT LEAST TWO CONNECTED WROUGHT METAL COMPONENTS, EACH COMPONENT HAVING A SPECIALLY FORMED EDGE CONFIGURATION AND A PLAIN FORMED REMAINING PORTION. THE HOLLOW AIRFOIL MEMBER IS FORMED BY CONNECTING THE PLAIN FORMED PORTION OF THE FIRST COMPONENT WITH THE SPECIALLY FORMED EDGE CONFIGURATION OF THE SECOND COMPONENT AND CONNECTING THE PLAIN FORMED PORTION OF THE SECOND COMPONENT WITH SPECIALLY FORMED EDGE CONFIGURATION OF THE FIRST COMPONENT, THESE CONNECTIONS BEING INWARD FORM THE OUTER EXTREMITIES OF THE SPECIALLY FORMED EDGE CONFIGURATIONS.
Inventors
- 👤 Ralph O Kaufman Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:55
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/147; B; B21; B21H; B21H7/00; B21H7/16; B23; B23P; B23P15/00; B23P15/04; E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/06; F01D5/18; E04C2003/0404; E04C2003/0408; E04C2003/0413; E04C2003/0426; E04C2003/043; E04C2003/0439; E04C2003/0443; E04C2003/0452; E04C2003/046; E04C2003/0473; E04C2003/0482; F05; F05D; F05D2240/00; F05D2240/80; F05D2240/81; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |