Patent US3235170A successfully refreshed from Google Patents.
US3235170A
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Assignee: Consolidated Vacuum Corp
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Filing: 1963-01-31
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Granted: 1966-02-15
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Expires: 1983-01-31
Abstract
No abstract record available.
Inventors
- 👤 Carl G Thoresen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:46
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; H01J41/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
AN IONIZATION VACUUM PUMP COMPRISING AN ENVELOPE FOR CONFINING AN EVACUATED SPACE CONTAINING RESIDUAL GAS MOLECULES, MEANS IN SAID ENVELOPE FOR IONIZING SAID RESIDUAL GAS MOLECULES, A COILED HEAT-RESISTANT WIRE IN SAID ENVELOPE DEFINING A BASKET STRUCTURE HAVING A SUBSTANTIALLY CLOSED LOWER END, AN OPEN UPPER END AND AN INTERNAL CAVITY EXTENDING FROM SAID OPEN UPPER END TO SAID SUBSTANTIALLY CLOSED LOWER END, A BODY OF GETTER MATERIAL INSERTED IN SAID BASKET STRUCTURE THROUGH SAID OPEN UPPER END TO EXTEND THROUGH SAID CAVITY TO SAID LOWER END, AND MEANS FOR HEATING SAID BASKET STRUCTURE
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |