US3254256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionization vacuum gauge having an emissive electrode support means
Assignee: Westinghouse Electric Corp
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Filing: 1962-08-10
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Granted: 1966-05-31
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Expires: 1982-08-10
Abstract
No abstract record available.
Inventors
- 👤 Richard J Melling
- 👤 Boyd J Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:10
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A AN IONIZATION LOW PRESSURE GAUGE ADAPTED TO BE DISPOSED IN AN ATMOSPHERE TO MEASURE THE PRESSURE THEREIN, COMPRISING A PLANAR ION COLLECTING MEANS, A PLANAR ELECTRON COLLECTING MEANS POSITIONED PARALLEL TO SAID ION COLLECTING MEANS AND SPACED THEREFROM, AN ELONGATED ELECTRON EMITTING MEANS POSITIONED BETWEEN SAID ION COLLECTING MEANS AND SAID ELECTRON COLLECTING MEANS, SAID ELECTRON COLLECTING MEANS SUPPORTED FROM A BASE MEMBER BY MEANS OF MEMBERS CAPABLE OF EMISSION OF ELECTRONS UPON PASSAGE OF CURRENT THERETHROUGH, SAID LASTMENTIONED MEMBERS BEING SO POSITIONED WITH RESPECT TO SAID ION COLLECTING MEANS THAT THE ELECTRONS EMITTED BY SAID LAST-MENTIONED MEMBERS STRIKE AND THEREBY DEGAS SAID ION COLLECTING MEANS.
Claim 2
Dependent Claim
107 words
A AN IONIZATION LOW PRESSURE GAUGE ADAPTED TO BE DISPOSED IN AN ATMOSPHERE TO MEASURE THE PRESSURE THEREIN, COMPRISING A PLANAR ION COLLECTING MEANS, A PLANAR ELECTRON COLLECTING MEANS POSITIONED PARALLEL TO SAID ION COLLECTING MEANS AND SPACED THEREFROM, AN ELONGATED ELECTRON EMITTING MEANS POSITIONED BETWEEN SAID ION COLLECTING MEANS AND SAID ELECTRON COLLECTING MEANS, SAID ELECTRON COLLECTING MEANS SUPPORTED FROM A BASE MEMBER BY MEANS OF MEMBERS CAPABLE OF EMISSION OF ELECTRONS UPON PASSAGE OF CURRENT THERETHROUGH, SAID LASTMENTIONED MEMBERS BEING SO POSITIONED WITH RESPECT TO SAID ION COLLECTING MEANS THAT THE ELECTRONS EMITTED BY SAID LAST-MENTIONED MEMBERS STRIKE AND THEREBY DEGAS SAID ION COLLECTING MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |