US3208286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle size analyzer
Assignee: Individual
•
Filing: 1962-08-02
•
Granted: 1965-09-28
•
Expires: 1982-08-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:39
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/04; G01N15/02; G01N29/00; G01N29/02; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02818
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE METHOD OF MEASURING THE AVERAGE SIZE OF AN AGGREGATE OF PARTICLES WHICH COMPRISES: INTRODUCING A AGGREGATE OF PARTICLES INTO A SETTLING CHAMBER CONTAINING A SUITABLE LIQUID; ALLOWING THE PARTICLES TO SETTLE ACCORDING TO THEIR RESPECTIVE TERMINAL VELOCITIES; IRRADIATING AT LEAST A PORTION OF THE SAID FALLING PATICLES WITH A BEAM OF ULTRASONIC ENERGY; RECEIVING A PORTION OF THE ULTRASONIC ENERGY SCATTERED BY THE SAID FALLING PARTICLES; DETERMING THE FREQUENCY DIFFERENCE BETWEEN THE SAID AVERAGE SIZE OF THE SAID CEIVED SIGNALS; AND INDICATING THE AVERAGE SIZE OF THE SAID PARTICLES AS A FUNCTION OF THE SAID DIFFERENCE FREQUENCY.
Claim 2
Independent Claim
98 words
THE METHOD OF MEASURING THE AVERAGE SIZE OF AN AGGREGATE OF PARTICLES WHICH COMPRISES: INTRODUCING A AGGREGATE OF PARTICLES INTO A SETTLING CHAMBER CONTAINING A SUITABLE LIQUID; ALLOWING THE PARTICLES TO SETTLE ACCORDING TO THEIR RESPECTIVE TERMINAL VELOCITIES; IRRADIATING AT LEAST A PORTION OF THE SAID FALLING PATICLES WITH A BEAM OF ULTRASONIC ENERGY; RECEIVING A PORTION OF THE ULTRASONIC ENERGY SCATTERED BY THE SAID FALLING PARTICLES; DETERMING THE FREQUENCY DIFFERENCE BETWEEN THE SAID AVERAGE SIZE OF THE SAID CEIVED SIGNALS; AND INDICATING THE AVERAGE SIZE OF THE SAID PARTICLES AS A FUNCTION OF THE SAID DIFFERENCE FREQUENCY.
References Cited (Backward Citations)
US2597899A
Cited
US2908888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |