Patent US3233169A successfully refreshed from Google Patents.
US3233169A
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Electric discharge vacuum pump having an auxiliary pressure sensor
Assignee: NEC Corp
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Filing: 1962-12-03
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Granted: 1966-02-01
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Asamaki Tatuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:37
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/18; H01J41/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
AN ELECTRON DISCHARGE TYPE VACUUM DEVICE HAVING MEANS FOR DISCRIMINATING A VACUUM CONDITION THEREIN FROM A CONDITION OF ATMOSPHERIC PRESSURE THEREIN, SAID DEVICE CONSISTING OF A VACUUM ENVELOPE, AN EXHAUST PORT PROVIDED IN A WALL OF SAID ENVELOPE FOR COOPERATING WITH PUMPING MEANS TO CREATE A VACUUM IN SAID ENVELOPE, AN ANODE ELEMENT AND A CATHODE ELEMENT DISPOSED IN SPACED RELATIONSHIP WITH RESPECT TO ONE ANOTHER IN THE INTERIOR OF SAID ENVELOPE, A FIRST ELECTRIC CONDUCTOR CONNECTED TO ONE OF SAID ELEMENTS FOR IMPRESSING A FIRST POTENTIAL ON SAID ONE ELEMENT, A SECOND ELECTRIC CONDUCTOR CONNECTED TO THE OTHER OF SAID ELEMENTS FOR IMPRESSING A SECOND POTENTIAL ON SAID OTHER ELEMENT, AND AN ELECTRIC DISCHARGE GAP WITHIN SAID ENVELOPE, SAID GAP COMPRISING A SMALL SPACING BETWEEN ONE OF SAID ELEMENTS AND A CONDUCTIVE MEMBER DIRECTLY CONNECTED TO THE OTHER OF SAID ELEMENTS,
Claim 2
Dependent Claim
142 words
AN ELECTRON DISCHARGE TYPE VACUUM DEVICE HAVING MEANS FOR DISCRIMINATING A VACUUM CONDITION THEREIN FROM A CONDITION OF ATMOSPHERIC PRESSURE THEREIN, SAID DEVICE CONSISTING OF A VACUUM ENVELOPE, AN EXHAUST PORT PROVIDED IN A WALL OF SAID ENVELOPE FOR COOPERATING WITH PUMPING MEANS TO CREATE A VACUUM IN SAID ENVELOPE, AN ANODE ELEMENT AND A CATHODE ELEMENT DISPOSED IN SPACED RELATIONSHIP WITH RESPECT TO ONE ANOTHER IN THE INTERIOR OF SAID ENVELOPE, A FIRST ELECTRIC CONDUCTOR CONNECTED TO ONE OF SAID ELEMENTS FOR IMPRESSING A FIRST POTENTIAL ON SAID ONE ELEMENT, A SECOND ELECTRIC CONDUCTOR CONNECTED TO THE OTHER OF SAID ELEMENTS FOR IMPRESSING A SECOND POTENTIAL ON SAID OTHER ELEMENT, AND AN ELECTRIC DISCHARGE GAP WITHIN SAID ENVELOPE, SAID GAP COMPRISING A SMALL SPACING BETWEEN ONE OF SAID ELEMENTS AND A CONDUCTIVE MEMBER DIRECTLY CONNECTED TO THE OTHER OF SAID ELEMENTS,
References Cited (Backward Citations)
US2131897A
Cited
US3101431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |