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Patent US3019737A successfully refreshed from Google Patents.
US3019737A
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Leaf spring seal for pumps
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1960-02-12
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Granted: 1962-02-06
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Expires: 1980-02-12
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Prasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:06
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0023; F04C15/0026; F04C2/00; F04C2/08; F04C2/082; F04C2/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US164147A
Cited
US2702509A
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US2793595A
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US2809592A
Cited
US2923248A
Cited
FR1105262A
Cited
US2772632A
Cited
FR1121180A
Cited
US2874524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |