US3373795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gating of unshrouded airfoils to permit directional solidification
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1965-08-10
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Granted: 1968-03-19
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Expires: 1985-08-10
Abstract
No abstract record available.
Inventors
- 👤 Frank J Hein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:15
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/04; B22D27/045; B23; B23P; B23P15/00; B23P15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1103039A
Cited
DE410204C
Cited
US2147880A
Cited
US2835007A
Cited
US3314116A
Cited
US3204303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |