US3253183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionization manometer
Assignee: US Philips Corp
•
Filing: 1961-06-08
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Granted: 1966-05-24
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Expires: 1981-06-08
Abstract
No abstract record available.
Inventors
- 👤 Antonius Gerardus Joha Oostrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:35
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/04; G; G01; G01L; G01L21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A DEVICE FOR MEASURING LOW GAS PRESSURES COMPRISING AN ENVELOPE INCLUDING MEANS FOR COMMUNICATING WITH A SPACE IN WHICH GAS PRESSURE IS TO BE MEASURED, A GRIDLIKE ANODE ELECTRODE WITHIN SAID ENVELOPE, AN ELONGATED COLLECTOR ELECTRODE WITHIN SAID GRID-LIKE ELECTRODE, SAID COLLECTOR ELECTRODE HAVING A DIAMETER WHICH IS SMALLER THAN 10$, AN ELECTRON EMITTING CATHODE WITHIN SAID ENVELOPE BUT OUTSIDE OF SAID GRID-LIKE ELECTRODE, MEANS APPLY-
Claim 2
Independent Claim
66 words
A DEVICE FOR MEASURING LOW GAS PRESSURES COMPRISING AN ENVELOPE INCLUDING MEANS FOR COMMUNICATING WITH A SPACE IN WHICH GAS PRESSURE IS TO BE MEASURED, A GRIDLIKE ANODE ELECTRODE WITHIN SAID ENVELOPE, AN ELONGATED COLLECTOR ELECTRODE WITHIN SAID GRID-LIKE ELECTRODE, SAID COLLECTOR ELECTRODE HAVING A DIAMETER WHICH IS SMALLER THAN 10$, AN ELECTRON EMITTING CATHODE WITHIN SAID ENVELOPE BUT OUTSIDE OF SAID GRID-LIKE ELECTRODE, MEANS APPLY-
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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |