Patent US3263434A successfully refreshed from Google Patents.
US3263434A
Expired / Lapsed
US
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High vacuum cryopumps
Assignee: Bendix Balzers Vacuum Inc
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Filing: 1965-03-16
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Granted: 1966-08-02
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Expires: 1985-03-16
Abstract
No abstract record available.
Inventors
- 👤 Franz X Eder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:25
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/0005; F04B37/00; F04B37/06; F04B37/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A CRYOPUMP FOR REMOVING GAS FROM A VESSEL COMPRISING: A COMPRESSOR, A PUMP CASING EXTENDING INTO THE VESSEL TO BE EVACUATED, A COUNTERCURRENT HEAT EXCHANGER IN SAID CASING, AND CONNECTING MEANS FORMING A CLOSED CIRCUIT FOR CONNECTING SAID COMPRESSOR TO SAID HEAT EXCHANGER AND SAID HEAT EXCHANGER TO SAID MACHINE AND SAID MACHINE TO SAID COMPRESSOR, A PORTION OF THE OUTER WALL OF SAID PUMP CASING FORMING THE CONDENSATION SURFACE FOR SAID CRYOPUMP.
Claim 2
Dependent Claim
73 words
A CRYOPUMP FOR REMOVING GAS FROM A VESSEL COMPRISING: A COMPRESSOR, A PUMP CASING EXTENDING INTO THE VESSEL TO BE EVACUATED, A COUNTERCURRENT HEAT EXCHANGER IN SAID CASING, AND CONNECTING MEANS FORMING A CLOSED CIRCUIT FOR CONNECTING SAID COMPRESSOR TO SAID HEAT EXCHANGER AND SAID HEAT EXCHANGER TO SAID MACHINE AND SAID MACHINE TO SAID COMPRESSOR, A PORTION OF THE OUTER WALL OF SAID PUMP CASING FORMING THE CONDENSATION SURFACE FOR SAID CRYOPUMP.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |