Patent US3390293A successfully refreshed from Google Patents.
US3390293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High energy particle generator
Assignee: Varian Medical Systems Inc
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Filing: 1964-06-30
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Granted: 1968-06-25
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Expires: 1984-06-30
Abstract
No abstract record available.
Inventors
- 👤 Craig S Nunan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:15
CPC Classifications
H; H05; H05H; H05H6/00; H05H7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A POSITRON GENERATING AND CONFINING APPARATUS INCLUDING MEANS FOR GENERATING A BEAM OF ELECTRONS; MEANS FOR ACCELERATING SAID BEAM OF ELECTRONS TO SUBSTANTIALLY RELATIVISTIC VELOCITY; A TARGET ELECTRODE OF A MATERIAL HAVING A HIGH ATOMIC NUMBER; MEANS FOR DIRECTING SAID ACCELERATED BEAM OF ELECTRONS ONTO SAID TARGET FOR GENERATING POSITRONS; MEANS DEFINING A HIGH INTENSITIVITY SHORT LONGITUDINALLY MAGNETIC FIELD EXTENDING THROUGH SAID TARGET AND SUBSTANTIALLY ALIGNED WITH THE DIRECTION OF INCIDENCE OF SAID BEAM OF ELECTRONS FOR CONFINING THE POSITRONS GENERATED IN SAID TARGET AND IMPARTING A ROTATIONAL MOMENTUM TO SAID POSITRONS, SAID MAGNETIC FIELD OF SAID FIELD DEFINING MEANS OF A LENGTH SUCH THAT POSITRONS IN A DESIRED BAND OF ENERGIES ROTATE THROUGH A MEAN ANGLE OF SUBSTANTIALLY 1810*; AND MEANS FOR ACCELERATING THE POSITRONS AFTER LEAVING SAID MAGNETIC FIELD DEFINING MEANS.
Claim 2
Dependent Claim
133 words
A POSITRON GENERATING AND CONFINING APPARATUS INCLUDING MEANS FOR GENERATING A BEAM OF ELECTRONS; MEANS FOR ACCELERATING SAID BEAM OF ELECTRONS TO SUBSTANTIALLY RELATIVISTIC VELOCITY; A TARGET ELECTRODE OF A MATERIAL HAVING A HIGH ATOMIC NUMBER; MEANS FOR DIRECTING SAID ACCELERATED BEAM OF ELECTRONS ONTO SAID TARGET FOR GENERATING POSITRONS; MEANS DEFINING A HIGH INTENSITIVITY SHORT LONGITUDINALLY MAGNETIC FIELD EXTENDING THROUGH SAID TARGET AND SUBSTANTIALLY ALIGNED WITH THE DIRECTION OF INCIDENCE OF SAID BEAM OF ELECTRONS FOR CONFINING THE POSITRONS GENERATED IN SAID TARGET AND IMPARTING A ROTATIONAL MOMENTUM TO SAID POSITRONS, SAID MAGNETIC FIELD OF SAID FIELD DEFINING MEANS OF A LENGTH SUCH THAT POSITRONS IN A DESIRED BAND OF ENERGIES ROTATE THROUGH A MEAN ANGLE OF SUBSTANTIALLY 1810*; AND MEANS FOR ACCELERATING THE POSITRONS AFTER LEAVING SAID MAGNETIC FIELD DEFINING MEANS.
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) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |