US3666375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping a high or low temperature fluid
Assignee: ERNEST H PRIEST
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Filing: 1969-08-26
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Granted: 1972-05-30
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Expires: 1989-08-26
Abstract
Abstract HEAT-TRANSFER SYSTEMS USING OXIDIZABLE HEAT-TRANSFER FLUIDS HAVE OXIDATION PROBLEMS AROUND THE PUMP SHAFT SEAL. ACCORDING T THIS INVENTION, THE PROBLEM IS SOLVED BY HAVING THE SEAL AT THE REMOTE END OF A BERRIER SECTION CONNECTED TO THE CASING OF THE PUMP SO THAT THE BARRIER SECTION CAN BE COOLED TO KEEP THE SEAL COOL ENOUGH.
Inventors
- 👤 Ernest H Priest
- 👤 Gordon M Priest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:15
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/58; F04D29/586; F04D29/588; F04D29/08; F04D29/10; F04D29/106; F04D29/108; F04D7/00; F04D7/02; F04D7/06; F16; F16J; F16J15/00; F16J15/16; F16J15/162; Y; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |