US3093998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for testing fluids for particle contamination
Assignee: Grumman Corp
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Filing: 1959-11-06
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Granted: 1963-06-18
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Expires: 1979-11-06
Abstract
No abstract record available.
Inventors
- 👤 Charles P Albertson
- 👤 Warren E Strittmatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:37
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/02; G01N29/032; G01N15/00; G01N15/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
A METHOD OF DETERMINING THE NUMBER AND SIZES OF CONTAMINANT PARTICLES IN A FLUID, WHICH COMPRISES THE STEPS OF: CAUSING SAID FLUID TO FLOW PAST A TESTING POSITION; MEASURING THE RATE OF FLUID FLOW PAST SAID TESTING POSITION; SUBJECTING SAID POSITION AND ITS FLUID TO THE ACTION OF ULTRASONIC PULES AT A RATE OF REPETITION SELECTED RELATIVE TO THE RATE OF FLOW SUCH THAT ANY ONE PARTICLE IN THE TESTING POSITION WILL BE SUBJECTED TO A PREDETERMINED NUMBER OF PULSES AS THAT PARTICLE PASSES THROUGH THE TESTING POSITION; AND INDICATING THE NUMBER AND MAGNITUDE OF THE REFLECTIONS OF SAID PULSES RETURNED FROM THE FLUID IN TESTING POSITION.
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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |