Patent US2806433A successfully refreshed from Google Patents.
US2806433A
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Leakage control for centrifugal pump shaft seals
Assignee: BOUR Co Inc
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Filing: 1952-07-26
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Granted: 1957-09-17
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Expires: 1972-07-26
Abstract
No abstract record available.
Inventors
- 👤 Bour Harry E La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:09
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/06; F04D15/00; F04D15/0005; F04D15/0022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1028098A
Cited
GB109611A
Cited
US1935924A
Cited
US2381823A
Cited
US2365650A
Cited
US2353871A
Cited
US2381824A
Cited
US2602467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |