Patent EP0042988A2 successfully refreshed from Google Patents.
US3101431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sputter ion protective apparatus
Assignee: Varian Medical Systems Inc
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Filing: 1961-05-29
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Granted: 1963-08-20
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Robert L Jepsen
- 👤 Arthur B Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:26
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; H01J41/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A COLD CATHODE VACUUM DISCHARGE APPARATUS COMPRISING AN ANODE ELECTRODE, A CATHODE ELECTRODE ELECTRICALLY INSULATED AND SPACED FROM SAID ANODE ELECTRODE, SAID ANODE AND CATHODE ELECTRODES PROVIDING A PRIMARY ELECTRON DISCHARGE PATH, ADDITIONAL ELECTRODE MEANS FOR PROVIDING AN AUXILIARY ELECTRON DISCHARGE PATH, SAID ADDITIONAL ELECTRODE MEANS INCLUDING A HOLLOW CYLINDRICAL ELECTRODE, A ROD ELECTRODE EXTENDING WITHIN SAID HOLLOW CYLINDRICAL ELECTRODE, AND SAID HOLLOW CYLINDRICAL ELECTRODE AND SAID ROD ELECTRODE FROM SAID AUXILIARY ELECTRON DISCHARGE PATH, A VACUUM ENVELOPE ENCLOSING SAID ANODE, CATHODE, AND ADDITIONAL ELECTRODES, AND CONDUCTOR TERMINAL MEANS FOR CONNECTING SAID GLOW DISCHARGE DEVICE TO A PLURALITY OF SEPARATE CIRCUITS OUTSIDE OF SAID ENVELOPE WHEREIN THE CURRENT DRAWN BY SAID PRIMARY DISCHARGE PATH MAY BE ISOLATED FROM THE CURRENT DRAWN BY SAID AUXILIARY DISCHARGE PATH.
Claim 2
Dependent Claim
126 words
A COLD CATHODE VACUUM DISCHARGE APPARATUS COMPRISING AN ANODE ELECTRODE, A CATHODE ELECTRODE ELECTRICALLY INSULATED AND SPACED FROM SAID ANODE ELECTRODE, SAID ANODE AND CATHODE ELECTRODES PROVIDING A PRIMARY ELECTRON DISCHARGE PATH, ADDITIONAL ELECTRODE MEANS FOR PROVIDING AN AUXILIARY ELECTRON DISCHARGE PATH, SAID ADDITIONAL ELECTRODE MEANS INCLUDING A HOLLOW CYLINDRICAL ELECTRODE, A ROD ELECTRODE EXTENDING WITHIN SAID HOLLOW CYLINDRICAL ELECTRODE, AND SAID HOLLOW CYLINDRICAL ELECTRODE AND SAID ROD ELECTRODE FROM SAID AUXILIARY ELECTRON DISCHARGE PATH, A VACUUM ENVELOPE ENCLOSING SAID ANODE, CATHODE, AND ADDITIONAL ELECTRODES, AND CONDUCTOR TERMINAL MEANS FOR CONNECTING SAID GLOW DISCHARGE DEVICE TO A PLURALITY OF SEPARATE CIRCUITS OUTSIDE OF SAID ENVELOPE WHEREIN THE CURRENT DRAWN BY SAID PRIMARY DISCHARGE PATH MAY BE ISOLATED FROM THE CURRENT DRAWN BY SAID AUXILIARY DISCHARGE PATH.
References Cited (Backward Citations)
US2758232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |