US2944785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller for turbine engine and the like
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1955-05-18
•
Granted: 1960-07-12
•
Expires: 1975-05-18
Abstract
No abstract record available.
Inventors
- 👤 Sampietro Achilles Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:36
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/10; F04D17/12; F01; F01D; F01D25/00; F01D25/24; F04D29/00; F04D29/08; F04D29/16; F04D29/161
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE208397C
Cited
US1309282A
Cited
US868653A
Cited
GB190620644A
Cited
US1229274A
Cited
DE345856C
Cited
DE518106C
Cited
US2127985A
Cited
US2668501A
Cited
US2768808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |