Patent US3178930A successfully refreshed from Google Patents.
US3178930A
Expired / Lapsed
US
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Monitor and spectrometer for atmospheric particulate matter
Assignee: Arthur D Little Inc
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Filing: 1963-04-08
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Granted: 1965-04-20
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Charles B Moore
- 👤 Vonnegut Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:38
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/622; G01N15/00; G01N15/02; G01N15/0266; G01N15/06; G01N15/0656; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A DEVICE FOR INDICATING THE TOTAL CONCENTRATION OF PARTICLES IN A GASEOUS FLUID COMPRISING: (A) AN ION FILTER COMPRISING A PAIR OF CONCENTRICALLY ARRANGED ELECTRICALLY CONDUCTIVE WALLS BETWEEN WHICH SAID FLUID FLOWS, (B) MEANS FOR IMPOSING AN ELECTRIC POTENTIAL BETWEEN SAID CONDUCTIVE WALLS, (C) AN INLET DUCT LEADING TO SAID ION FILTER AND ARRANGED TO RECEIVE SAID GASEOUS FLUID FOR TESTING, (D) A RADIOACTIVE PARTICLE CHARGING ELEMENT IN SAID INLET DUCT, (E) MEANS COMPRISING AN ELECTRIC CIRCUIT FOR IMPOSING AN ELECTRIC POTENTIAL BETWEEN SAID ELEMENT AND THE WALLS OF SAID INLET DUCT,
Claim 2
Independent Claim
92 words
A DEVICE FOR INDICATING THE TOTAL CONCENTRATION OF PARTICLES IN A GASEOUS FLUID COMPRISING: (A) AN ION FILTER COMPRISING A PAIR OF CONCENTRICALLY ARRANGED ELECTRICALLY CONDUCTIVE WALLS BETWEEN WHICH SAID FLUID FLOWS, (B) MEANS FOR IMPOSING AN ELECTRIC POTENTIAL BETWEEN SAID CONDUCTIVE WALLS, (C) AN INLET DUCT LEADING TO SAID ION FILTER AND ARRANGED TO RECEIVE SAID GASEOUS FLUID FOR TESTING, (D) A RADIOACTIVE PARTICLE CHARGING ELEMENT IN SAID INLET DUCT, (E) MEANS COMPRISING AN ELECTRIC CIRCUIT FOR IMPOSING AN ELECTRIC POTENTIAL BETWEEN SAID ELEMENT AND THE WALLS OF SAID INLET DUCT,
References Cited (Backward Citations)
US2986923A
Cited
US3114877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |