Patent US3280365A successfully refreshed from Google Patents.
US3280365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Penning-type discharge ionization gauge with discharge initiation electron source
Assignee: General Electric Co
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Filing: 1963-04-15
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Granted: 1966-10-18
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Expires: 1983-04-15
Abstract
No abstract record available.
Inventors
- 👤 James R Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:44
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/04; H01J41/06; H01J41/12; H01J41/14; H01J41/16; H01J41/18; H01J41/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN IONIZATION DEVICE FOR MEASURING AND ATTAINING LOW PRESSURES AND STARTING MEANS THEREOF COMPRISING IN COMBINATION, (A) A HOLLOW ANODE MEMBER, 7B) A CATHODE MEMBER ON EACH SIDE OF SAID HOLLOW ANODE MEMBER TO DEFINE AN ENCLOSED INTERACTION IONIZATION SPACE THEREBETWEEN AND THROUGH SAID ANODE, (C) MEANS TO CAUSE A PENNING TYPE DISCHARGE BETWEEN SAID CATHODES AND SAID ANODE IN SAID INTERACTION SPACE, (D) AND A SEPARATE ELECTRON SOURCE AND INJECTION MEANS EXTERNAL TO SAID ENCLOSED INTERACTION SPACE AND SEPARATE FROM SAID ANODE AND SAID CATHODES TO DIRECTLY INJECT ELECTRONS INTO SAID INTERACTION SPACE TO INITIATE SAID PENNING DISCHARGE, (E) SAID SOURCE AND INJECTION MEANS BEING POSITIONED AND ARRANGED TO MINIMIZE THE CONCENTRATED EROSIVE EFFECTS OF SAID PENNING DISCHARGE.
Claim 2
Dependent Claim
119 words
AN IONIZATION DEVICE FOR MEASURING AND ATTAINING LOW PRESSURES AND STARTING MEANS THEREOF COMPRISING IN COMBINATION, (A) A HOLLOW ANODE MEMBER, 7B) A CATHODE MEMBER ON EACH SIDE OF SAID HOLLOW ANODE MEMBER TO DEFINE AN ENCLOSED INTERACTION IONIZATION SPACE THEREBETWEEN AND THROUGH SAID ANODE, (C) MEANS TO CAUSE A PENNING TYPE DISCHARGE BETWEEN SAID CATHODES AND SAID ANODE IN SAID INTERACTION SPACE, (D) AND A SEPARATE ELECTRON SOURCE AND INJECTION MEANS EXTERNAL TO SAID ENCLOSED INTERACTION SPACE AND SEPARATE FROM SAID ANODE AND SAID CATHODES TO DIRECTLY INJECT ELECTRONS INTO SAID INTERACTION SPACE TO INITIATE SAID PENNING DISCHARGE, (E) SAID SOURCE AND INJECTION MEANS BEING POSITIONED AND ARRANGED TO MINIMIZE THE CONCENTRATED EROSIVE EFFECTS OF SAID PENNING DISCHARGE.
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |