Patent US3387181A successfully refreshed from Google Patents.
US3387181A
Expired / Lapsed
US
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Apparatus for determining the differential ion count in an atmosphere and for controlling same
Assignee: Deering Milliken Research Corp
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Filing: 1963-11-05
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Granted: 1968-06-04
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Expires: 1983-11-05
Abstract
No abstract record available.
Inventors
- 👤 John W Michener
- 👤 Philip N Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:44
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/02; G; G01; G01N; G01N27/00; G01N27/62; G01T; G01T7/00; G01T7/02; G01T7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
IN COMBINATION WITH A GRID CARRYING A DIRECT CURRENT CHARGE, AN ATMOSPHERIC DIFFERENTIAL ION COUNTER DEVICE COMPRISING A CHAMBER, ION COLLECTING MEANS DISPOSED WITHIN SAID CHAMBER, MEANS FOR DRAWING ATMOSPHERE THROUGH SAID CHAMBER AND THROUGH SAID ION COLLECTING MEANS AND MEANS FOR DETERMINING THE CURRENT RESULTANT
Claim 2
Dependent Claim
46 words
IN COMBINATION WITH A GRID CARRYING A DIRECT CURRENT CHARGE, AN ATMOSPHERIC DIFFERENTIAL ION COUNTER DEVICE COMPRISING A CHAMBER, ION COLLECTING MEANS DISPOSED WITHIN SAID CHAMBER, MEANS FOR DRAWING ATMOSPHERE THROUGH SAID CHAMBER AND THROUGH SAID ION COLLECTING MEANS AND MEANS FOR DETERMINING THE CURRENT RESULTANT
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |