Patent US3625019A successfully refreshed from Google Patents.
US3625019A
Expired / Lapsed
US
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Vacuum pump with demountable cold trap and getter pump
Assignee: Sargent Welch Scientific Co
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Filing: 1969-10-27
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Granted: 1971-12-07
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Expires: 1989-10-27
Abstract
Abstract A TURBO-MOLECULAR VACUUM PUMP HAVING A CYLINDRICAL CASING WITH AT LEAST TWO LARGE OPENINGS THEREIN, ONE ATTACHED TO OR ADAPTED FOR CONNECTION TO A VESSEL TO BE EVACUATED AND THE OTHER FOR PROVIDING ACCESS TO A COLD TRAP BENEATH WHICH IS DISPOSED A GETTER PUMP, SAID COLD TRAP AND GETTER PUMP BEING ARRANGED IN THE HIGH VACCUM PORTION OF THE PUMP, WHICH CONSISTS OF THE COMPRESSOR SECTIONS DISPOSED OPPOSITELY IN AXIAL PORTIONS OF SAID CASING. THE COLD TRAP AND GETTER PUMP ARE DEMOUNTABLY ATTACHED, AND MAY BE ADVANTAGEOUSLY USED WHERE CONTAMINANTS OF THE TYPE BEST REMOVED BY THE GETTER PUMP OR COLD TRAP ARE PRESENT IN THE INFLUENT STREAM.
Inventors
- 👤 Gordon E Osterstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:51
CPC Classifications
F; F04; F04D; F04D19/00; F04D19/02; F04D19/04; F04D19/046
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |