US3553451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quadrupole in which the pole electrodes comprise metallic rods whose mounting surfaces coincide with those of the mounting means
Assignee: UTI
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Filing: 1968-01-30
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Granted: 1971-01-05
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Expires: 1988-01-30
Abstract
Abstract A quadrupole mass spectrometer is disclosed wherein the outwardly facing surfaces of elongated rods arranged in a rectangular array about a common space are of circular curvature in cross section having a radius of curvature conforming to the curvature of the inner surface of a plurality of ceramic cylinders having circular inner surface cross sections, axially enclosing and positioning the quadrupole rods.
Inventors
- 👤 Paul Michael Uthe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:03
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/34; H01J49/42; H01J49/4205; H01J49/421; H01J49/4215; H01J49/02; H01J49/06; H01J49/068; H01J49/4255
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
134 words
A quadrupole mass spectrometer of the type wherein a DC and superimposed RF field is established within an array of elongated rods mounted to receive ions from an ion source and selectively pass ions to an ion detector comprising: at least one mounting means of nonconductive material, each said mounting means having a passageway therethrough of circular cross section; a plurality of elongated metallic rods mounted in an array within the passageway of said mounting means about a common space the surface of each of said elongated rods facing outwardly from the common space having in cross section a circular curvature having a radius of curvature equal to the radius of curvature of the surface of the passageway through each of said mounting means, and means for securing said rods to said mounting means.
Claim 2
Dependent Claim
134 words
A quadrupole mass spectrometer of the type wherein a DC and superimposed RF field is established within an array of elongated rods mounted to receive ions from an ion source and selectively pass ions to an ion detector comprising: at least one mounting means of nonconductive material, each said mounting means having a passageway therethrough of circular cross section; a plurality of elongated metallic rods mounted in an array within the passageway of said mounting means about a common space the surface of each of said elongated rods facing outwardly from the common space having in cross section a circular curvature having a radius of curvature equal to the radius of curvature of the surface of the passageway through each of said mounting means, and means for securing said rods to said mounting means.
Claim 3
Dependent Claim
21 words
A quadrupole mass spectrometer as set forth in claim 1 wherein each said mounting means is formed of a ceramic material.
Claim 4
Dependent Claim
120 words
A quadrupole mass filter comprising a hollow cylindrical housing, at least one electrically insulating mounting means supported within said housing having an outside cylindrical surface comforming to the inside surface of said housing and a passageway therethrough of circular cross section, and a plurality of elongated metallic rods arranged in an array about a common space within said housing, said cylindrical mounting means axially enclosing said array of elongated rods, the surface of each of said elongated rods facing outwardly from the common space having a circular cross section of radius of curvature equal to the radius of curvature of the surface of the passageway through each said mounting means, and means foR securing said rods to said mounting means.
Claim 5
Dependent Claim
120 words
A quadrupole mass filter comprising a hollow cylindrical housing, at least one electrically insulating mounting means supported within said housing having an outside cylindrical surface comforming to the inside surface of said housing and a passageway therethrough of circular cross section, and a plurality of elongated metallic rods arranged in an array about a common space within said housing, said cylindrical mounting means axially enclosing said array of elongated rods, the surface of each of said elongated rods facing outwardly from the common space having a circular cross section of radius of curvature equal to the radius of curvature of the surface of the passageway through each said mounting means, and means foR securing said rods to said mounting means.
Claim 6
Dependent Claim
33 words
A quadrupole mass filter as set forth in claim 3 wherein the surface of each of said elongated rods facing toward the common space enclosed by said rods is circular in cross section.
Claim 7
Dependent Claim
33 words
A quadrupole mass filter as set forth in claim 3 wherein the surface of each of said elongated rods facing toward the common space enclosed by said rods is hyperbolic in cross section.
Claim 8
Dependent Claim
24 words
A quadrupole mass filter as set forth in claim 3 wherein said array of elongated rods comprises a rectangular array of four elongated rods.
Claim 9
Dependent Claim
27 words
A quadrupole mass filter as set forth in claim 6 wherein said mounting means is formed in a cylindrical shape and is made of a ceramic material.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |