US2980028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear pump journal and face lubrication
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1957-08-19
•
Granted: 1961-04-18
•
Expires: 1977-08-19
Abstract
No abstract record available.
Inventors
- 👤 William V Edwards
- 👤 Donald L Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:31
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0057; F04C15/0061; F04C15/0088; F04C2/00; F04C2/08; F04C2/082; F04C2/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2775209A
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US2624287A
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US2816511A
Cited
US2676548A
Cited
US2820416A
Cited
US2808007A
Cited
US2756684A
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US2823617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |