US2835203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump impeller
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1952-12-22
•
Granted: 1958-05-20
•
Expires: 1972-12-22
Abstract
No abstract record available.
Inventors
- 👤 Cliborn Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:32
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/2266
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US705347A
Cited
US786384A
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US977101A
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US1756324A
Cited
DE565019C
Cited
US2017026A
Cited
DE684405C
Cited
DE720243C
Cited
GB643247A
Cited
US2571802A
Cited
US2612844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |