US3271999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the silting properties of liquids containing minute suspended particles
Assignee: EMD Millipore Corp
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Filing: 1963-05-01
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Granted: 1966-09-13
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Expires: 1983-05-01
Abstract
No abstract record available.
Inventors
- 👤 James L Dwyer
- 👤 Robert F Connelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:43
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/06; G01N15/0606; G01N15/0618
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
APPARATUS FOR EVALUATING A LIQUID HAVING PARTICLES THEREIN TO DETERMINE THE SLITING PROPERTIES COMPRISING A TRANSPARENT MEASURING CONDUIT OF UNIFORM CROSS-SECTION FOR RECEIVING THE LIQUID HAVING AN OUTLET FOR THE DISCHARGE OF THE LIQUID, A MICROPOROUS FILTER OF PREDETERMINED PORE SIZE MOUNTED IN THE OUTLET TO FILTER OUT PARTCLES HAVING A SIZE LARGER THAN THE PORES OF THE FILTER, MEANS FOR APPLYING A CONSTANT PRESSURE TO THE LIQUID CONTAINED IN THE CONDUIT TO FORCE IT TO FLOW THROUGH THE FILTER, MEANS FOR INDICATING THE PASSAGE OF SUCCESSIVE VOLUMES OF THE LIQUID FORCED TO FLOW FROM THE CONDUIT AND THROUGH THE FILTER, CONSISTING OF INDEX MARKS, ONE OF SAID MARKS BEING THE STARTING MARK, THE FIRST MARK BEING SPACED FROM THE STARTING MARK TO BE SUBSTANTIALLY EQUIVALENT TO THE FLOW OF CLEAN LIQUID, THE SECOND AND THIRD MARKS BEING LOCATED SO THAT THE VOLUME FROM THE STARTING MARK TO THE SECOND MARK IS EQUAL TO THE VOLUME FROM THE SECOND MARK TO THE THIRD MARK.
Claim 2
Dependent Claim
164 words
APPARATUS FOR EVALUATING A LIQUID HAVING PARTICLES THEREIN TO DETERMINE THE SLITING PROPERTIES COMPRISING A TRANSPARENT MEASURING CONDUIT OF UNIFORM CROSS-SECTION FOR RECEIVING THE LIQUID HAVING AN OUTLET FOR THE DISCHARGE OF THE LIQUID, A MICROPOROUS FILTER OF PREDETERMINED PORE SIZE MOUNTED IN THE OUTLET TO FILTER OUT PARTCLES HAVING A SIZE LARGER THAN THE PORES OF THE FILTER, MEANS FOR APPLYING A CONSTANT PRESSURE TO THE LIQUID CONTAINED IN THE CONDUIT TO FORCE IT TO FLOW THROUGH THE FILTER, MEANS FOR INDICATING THE PASSAGE OF SUCCESSIVE VOLUMES OF THE LIQUID FORCED TO FLOW FROM THE CONDUIT AND THROUGH THE FILTER, CONSISTING OF INDEX MARKS, ONE OF SAID MARKS BEING THE STARTING MARK, THE FIRST MARK BEING SPACED FROM THE STARTING MARK TO BE SUBSTANTIALLY EQUIVALENT TO THE FLOW OF CLEAN LIQUID, THE SECOND AND THIRD MARKS BEING LOCATED SO THAT THE VOLUME FROM THE STARTING MARK TO THE SECOND MARK IS EQUAL TO THE VOLUME FROM THE SECOND MARK TO THE THIRD MARK.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |