US3138029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle size measurement
Assignee: General Electric Co
•
Filing: 1959-05-29
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Granted: 1964-06-23
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Expires: 1979-05-29
Abstract
No abstract record available.
Inventors
- 👤 Theodore A Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:54
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A DEVICE FOR MEASURING THE AVERAGE SIZE OF AIRBORNE PARTICULATES, THE COMBINATION COMPRISING MEANS ADAPTED TO RECEIVE GASEOUS SAMPLES CONTAINING PARTICLES TO BE MEASURED, MEANS TO TREAT ONE OF SAID SAMPLES TO REMOVE A FRACTION OF SAID PARTICLES IN ACCORDANCE WITH THE SIZE OF SAID PARTICLES, AND MEANS TO DETERMINE THE AVERAGE SIZE OF SAID PARTICLES FROM THE REDUCTION IN PARTICLE CONNCENTRATION, SAID LAST MENTIONED MEANS INCLUDING PARTICLE MEASURING MEANS FOR SIMULTANEOUSLY COMPARING SAID TREATED AND UNTREATED GASEOUS SAMPLES AND DERIVING AN OUTPUT SIGNAL REPRESENTATIVE OF THE DIFFERENCE IN PARTICLE CONCENTRATION.
Claim 2
Dependent Claim
92 words
IN A DEVICE FOR MEASURING THE AVERAGE SIZE OF AIRBORNE PARTICULATES, THE COMBINATION COMPRISING MEANS ADAPTED TO RECEIVE GASEOUS SAMPLES CONTAINING PARTICLES TO BE MEASURED, MEANS TO TREAT ONE OF SAID SAMPLES TO REMOVE A FRACTION OF SAID PARTICLES IN ACCORDANCE WITH THE SIZE OF SAID PARTICLES, AND MEANS TO DETERMINE THE AVERAGE SIZE OF SAID PARTICLES FROM THE REDUCTION IN PARTICLE CONNCENTRATION, SAID LAST MENTIONED MEANS INCLUDING PARTICLE MEASURING MEANS FOR SIMULTANEOUSLY COMPARING SAID TREATED AND UNTREATED GASEOUS SAMPLES AND DERIVING AN OUTPUT SIGNAL REPRESENTATIVE OF THE DIFFERENCE IN PARTICLE CONCENTRATION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |