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US3469851A
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Pump shaft seal
Assignee: Danfoss AS
•
Filing: 1965-09-14
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Granted: 1969-09-30
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Expires: 1985-09-14
Abstract
No abstract record available.
Inventors
- 👤 Arne F Enemark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:54
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3496; F16J15/3464; F16J15/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2297477A
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US2405464A
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US2686155A
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US2644804A
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US2852097A
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FR1241626A
Cited
US3014742A
Cited
US3090627A
Cited
US3155393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |