Patent USH414H successfully refreshed from Google Patents.
USH414H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface ionization source
Assignee: United States Department of the Army
•
Filing: 1987-03-20
•
Granted: 1988-01-05
•
Expires: 2007-03-20
Abstract
Abstract An ionization source comprises a housing defining a space, a wire extendingo the space, a temperature control connected to the wire and an alkali metal glass bead attached to the wire to be heated by the temperature control. An ion extraction plate with an orifice therein covers the space and is insulated from the housing by an insulating ring. The housing includes a port for drawing a vacuum from the space and for leaking molecules into the space which are to form quasi ions on the glass bead. A focusing plate may also be provided over the extraction plate with an aperture lying on an ion axis which also extends through the orifice for the focusing of the ion beam.
Inventors
- 👤 Steven E. Young
- 👤 Sidney E. Buttrill, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:47
CPC Classifications
H; H01; H01J; H01J27/00; H01J27/02; H01J27/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
109 words
A surface ionization source comprising: a source housing defining an ion space; a support wire extending into said space; temperature control means connected to said wire for heating said wire; an alkali metal glass bead connected to said wire to be heated to form ions of molecules in said space; an ion extraction plate engaged to said housing and insulated from said housing, said extraction plate closing said space and having a beam orifice therein for the passage therethrough of an ion beam from said space; and biasing means connected to said housing and said extraction plate for forming a beam on a beam axis extending through said orifice.
Claim 2
Dependent Claim
109 words
A surface ionization source comprising: a source housing defining an ion space; a support wire extending into said space; temperature control means connected to said wire for heating said wire; an alkali metal glass bead connected to said wire to be heated to form ions of molecules in said space; an ion extraction plate engaged to said housing and insulated from said housing, said extraction plate closing said space and having a beam orifice therein for the passage therethrough of an ion beam from said space; and biasing means connected to said housing and said extraction plate for forming a beam on a beam axis extending through said orifice.
Claim 3
Dependent Claim
18 words
A surface ionization source according to claim 1 wherein said glass bead includes one of sodium or potassium.
Claim 4
Dependent Claim
46 words
A surface ionization source according to claim 1 including a focusing plate engaged over said extraction plate and having an aperture therein lying on said beam axis, said focusing plate being connected to said biasing means for focusing the beam of ions on said beam axis.
Claim 5
Dependent Claim
18 words
A surface ionization source according to claim 3 wherein said glass bead includes one of sodium or potassium.
Claim 6
Dependent Claim
43 words
A surface ionization source according to claim 4 including an insulating ceramic ring engaged to said housing and extending around said surface, said ring being engaged against said extraction plate for closing said surface and for insulating said extraction plate from said housing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |