US3296476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube
Assignee: Licentia Patent Verwaltungs GmbH
•
Filing: 1962-10-30
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Granted: 1967-01-03
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Expires: 1982-10-30
Abstract
No abstract record available.
Inventors
- 👤 Ernst-Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:56
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/112; H01J35/116
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A HIGH POWER X-RAY TUBE INCLUDING MEANS FOR PRODUCING AN X-RAY RADIATION FIELD WHICH HAS LINES OF ISODOSAGE THAT ARE SUBSTANTIALLY PARALLEL TO EACH OTHER, SAID MEANS COMPRISING, IN COMBINATION: AN ANODE HAVING A LARGE SURFACE AREA DEFINING A FOCAL POINT; AND A CATHODE INCLUDING A PLURALITY OF ELECTRON-EMITTING ELEMENTS WHICH ARE SPACED MORE CLOSELY TOGETHER AT THE EDGES OF SAID CATHODE THAN AT THE CENTER THEREOF FOR PRODUCING AN ELECTRON BEAM WHICH IMPINGES ON SAID FOCAL POINT AND WHICH HAS A CURRENT DENSITY WHICH INCREASES PROGRESSIVELY FROM ITS CENTRAL REGION TO ITS PERIPHERY.
Claim 2
Dependent Claim
94 words
A HIGH POWER X-RAY TUBE INCLUDING MEANS FOR PRODUCING AN X-RAY RADIATION FIELD WHICH HAS LINES OF ISODOSAGE THAT ARE SUBSTANTIALLY PARALLEL TO EACH OTHER, SAID MEANS COMPRISING, IN COMBINATION: AN ANODE HAVING A LARGE SURFACE AREA DEFINING A FOCAL POINT; AND A CATHODE INCLUDING A PLURALITY OF ELECTRON-EMITTING ELEMENTS WHICH ARE SPACED MORE CLOSELY TOGETHER AT THE EDGES OF SAID CATHODE THAN AT THE CENTER THEREOF FOR PRODUCING AN ELECTRON BEAM WHICH IMPINGES ON SAID FOCAL POINT AND WHICH HAS A CURRENT DENSITY WHICH INCREASES PROGRESSIVELY FROM ITS CENTRAL REGION TO ITS PERIPHERY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |