US3143647A
Expired / Lapsed
US
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Demountable mass-filter cell for use in high vacuum
Assignee: Siemens Schuckertwerke AG
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Filing: 1961-03-07
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Granted: 1964-08-04
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Expires: 1981-03-07
Abstract
No abstract record available.
Inventors
- 👤 Gunther Karl-Georg
- 👤 Freller Helmut
- 👤 Titze Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:17
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/34; H01J49/42; H01J49/4205; H01J49/421; H01J49/4215
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
AN ELECTRIC MASS FILTER COMPRISING A TUBULAR NEGATIVE-PRESSURE ENVELOPE FOR RECEIVING A GAS TO BE ANALYZED, AN ION SOURCE AND A COLLECTOR ELECTRODE SPACED FROM EACH OTHER IN SAID ENVELOPE AND DEFINING TOGETHER AN ION BEAM AXIS FROM SAID SOURCE TO SAID COLLECTOR ELECTRODE, AN ANALYZER ASSEMBLY HAVING A GROUP OF ION-DEFLECTING ELECTRODE RODS PARALLEL TO AND MUTUALLY SPACED ABOUT SAID AXIS BETWEEN SAID SOURCE AND SAID AXIS, SAID TUBULAR ENVELOPE HAVING A MIDDLE PORTION OF GLASS, TWO END PORTIONS OF GLASS AND TWO RING PORTIONS OF METAL FUSED TOGETHER WITH SAID GLASS PORTIONS BETWEEN SAID MIDDLE PORTION AND SAID RESPECTIVE END PORTIONS, SAID ANALYZER ASSEMBLY BEING MOUNTED ON AND AXIALLY BETWEEN SAID TWO RING PORTIONS.
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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |