US3288354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor diffusion pumps
Assignee: Edwards High Vacuum International Ltd
•
Filing: 1964-05-28
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Granted: 1966-11-29
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Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Nigel T M Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:04
CPC Classifications
F; F04; F04F; F04F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A VAPOR DIFFUSION PUMP FOR THE PRODUCTION OF ULTRA HIGH VACUA COMPRISING AN UPPER SRUCTURE INCLUDING A COOLED TRAP AND A BAFFLE, SUCH STRUCTURE REQUIRING BAKING FOR THE PURPOSE OF REMOVING GASES INIMICAL TO THE PRODUCTION OF HIGH VACUA, THE PUMP FURTHER COMPRISING A LOWER STRUCTURE INCLUDING A BOILER FOR A WORKING FLUID, AT LEAST ONE VAPOR TUBE AND JET, SAID UPPER AND LOWER STRUCTURES BEING PROVIDED WITH COUPLING FLANGES, MEANS COUPLING SAID FLANGES, AND A GASKET DISPOSED BETWEEN SAID FLANGES, THE JET, ON ASSEMBLY OF SAID UPPER AND LOWER STRUCTURES, BEING POSITIONED ABOVE SAID GASKET WHEREBY WHEN SAID UPPER STRUCTURE IS BAKED SAID GASKET IS NOT SUBJECTED TO HEAT WHICH MIGHT RESULT IN THE EVOLUTION OF GASES FROM SAID GASKET.
Claim 2
Dependent Claim
121 words
A VAPOR DIFFUSION PUMP FOR THE PRODUCTION OF ULTRA HIGH VACUA COMPRISING AN UPPER SRUCTURE INCLUDING A COOLED TRAP AND A BAFFLE, SUCH STRUCTURE REQUIRING BAKING FOR THE PURPOSE OF REMOVING GASES INIMICAL TO THE PRODUCTION OF HIGH VACUA, THE PUMP FURTHER COMPRISING A LOWER STRUCTURE INCLUDING A BOILER FOR A WORKING FLUID, AT LEAST ONE VAPOR TUBE AND JET, SAID UPPER AND LOWER STRUCTURES BEING PROVIDED WITH COUPLING FLANGES, MEANS COUPLING SAID FLANGES, AND A GASKET DISPOSED BETWEEN SAID FLANGES, THE JET, ON ASSEMBLY OF SAID UPPER AND LOWER STRUCTURES, BEING POSITIONED ABOVE SAID GASKET WHEREBY WHEN SAID UPPER STRUCTURE IS BAKED SAID GASKET IS NOT SUBJECTED TO HEAT WHICH MIGHT RESULT IN THE EVOLUTION OF GASES FROM SAID GASKET.
References Cited (Backward Citations)
US2508765A
Cited
GB587800A
Cited
FR1171098A
Cited
US3168819A
Cited
US3102678A
Cited
US3181776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |