US3248644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring positive and negative ion currents in the atmosphere
Assignee: RCA Corp
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Filing: 1961-12-21
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Granted: 1966-04-26
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Streib Albrecht
- 👤 Clarence W Hansell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:58
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J47/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
ION-CURRENT MEASURING APPARATUS ADAPTED TO BE EXPOSED TO THE ATMOSPHERE FOR MEASURING THE CONCENTRATION OF POSITIVE AND NEGATIVE IONS THERIN, SAID APPARATUS COMPRISING (A) A METAL CASE FORMED WITH AN OPENING IN A WALL THEREOF, SAID METAL CASE COMPRISING A COMMON CONNECTION, (B) TWO SPACED-APART ELECTRODES HAVING WIDE AND NARROW SURFACES, SAID WIDE SURFACES BEING DISPOSED IN A COPLANAR ARRANGEMENT WITHIN THE PROJECTED AREA OF SAID OPENING AND INSULATING MEANS FOR SUPPORTING SAID ELECTRODES WITH RESPECT TO SAID CASE, (C) AN ION-CURRENT INDICATING DEVICE HAVING TWO TERMINALS, (D) MEANS TO CONNECT ONE OF SAID TERMINALS TO SAID CASE, (E) MEANS TO APPLY A FIRST SOURCE OF VOLTAGE BETWEEN THE OTHER OF SAID TERMINALS AND ONE OF SAID ELECTRODES, AND (F) MEANS TO CONNECT A SECOND SOURCE OF VOLTAGE BETWEEN THE OTHER OF SAID ELECTRODES AND SAID CASE, SAID FIRST AND SAID SECOND SOURCES BEING EQUAL IN VOLTAGE AND BEING CONNECTED TO SAID ELECTRODES TO APPLY VOLTAGES OF OPPOSITE POLARITY TO SAID TWO ELECTRODES, RESPECTIVELY.
Claim 2
Dependent Claim
164 words
ION-CURRENT MEASURING APPARATUS ADAPTED TO BE EXPOSED TO THE ATMOSPHERE FOR MEASURING THE CONCENTRATION OF POSITIVE AND NEGATIVE IONS THERIN, SAID APPARATUS COMPRISING (A) A METAL CASE FORMED WITH AN OPENING IN A WALL THEREOF, SAID METAL CASE COMPRISING A COMMON CONNECTION, (B) TWO SPACED-APART ELECTRODES HAVING WIDE AND NARROW SURFACES, SAID WIDE SURFACES BEING DISPOSED IN A COPLANAR ARRANGEMENT WITHIN THE PROJECTED AREA OF SAID OPENING AND INSULATING MEANS FOR SUPPORTING SAID ELECTRODES WITH RESPECT TO SAID CASE, (C) AN ION-CURRENT INDICATING DEVICE HAVING TWO TERMINALS, (D) MEANS TO CONNECT ONE OF SAID TERMINALS TO SAID CASE, (E) MEANS TO APPLY A FIRST SOURCE OF VOLTAGE BETWEEN THE OTHER OF SAID TERMINALS AND ONE OF SAID ELECTRODES, AND (F) MEANS TO CONNECT A SECOND SOURCE OF VOLTAGE BETWEEN THE OTHER OF SAID ELECTRODES AND SAID CASE, SAID FIRST AND SAID SECOND SOURCES BEING EQUAL IN VOLTAGE AND BEING CONNECTED TO SAID ELECTRODES TO APPLY VOLTAGES OF OPPOSITE POLARITY TO SAID TWO ELECTRODES, RESPECTIVELY.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |