Patent US4137755A successfully refreshed from Google Patents.
US4137755A
Expired / Lapsed
US
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Material layer volume determination
Assignee: Individual
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Filing: 1977-12-20
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Granted: 1979-02-06
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Expires: 1997-12-20
Abstract
Abstract A technique for generally determining the volume of a layer of a constituent material in a centrifugally separated mixture of material. A centrifuge tube is used to hold the material mixture and an appropriately shaped body is disposed in the tube in the zone occupied by the constituent material whose volume is to be measured. The body reduces the available volume within the tube which may be occupied by the constituent material, and thus expands the axial extent of the constituent material to make visual measurement of the constituent material more accurate.
Inventors
- 👤 Stephen C. Wardlaw
- 👤 Robert A. Levine
- 👤 James V. Massey, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:11
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5021; B01L3/50215
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A method of determining the approximate volume of a constituent material layer in a material mixture having at least two adjacent material layers of different densities, said method comprising the steps of: a. putting the material mixture in a tubular container; b. centrifuging the material mixture so as to layer out the material layers according to specific gravity; c. elongating the material layer whose volume is to be measured by a factor of at least about four; and d. measuring the axial extent of the elongated constituent material layer while the mixture remains in the tubular container.
Claim 2
Independent Claim
97 words
A method of determining the approximate volume of a constituent material layer in a material mixture having at least two adjacent material layers of different densities, said method comprising the steps of: a. putting the material mixture in a tubular container; b. centrifuging the material mixture so as to layer out the material layers according to specific gravity; c. elongating the material layer whose volume is to be measured by a factor of at least about four; and d. measuring the axial extent of the elongated constituent material layer while the mixture remains in the tubular container.
Claim 3
Dependent Claim
26 words
The method of claim 1 comprising the further step of differentially coloring the constituent material layer being measured so as to render its boundaries more visible.
Claim 4
Independent Claim
120 words
A method of determining the approximate volume of a constituent material layer in a material mixture having at least two adjacent material layers of different densities, said method comprising the steps of: a. drawing the material mixture into a transparent tube; b. centrifuging the material mixture in the tube so as to layer out the material layers according to specific gravity; c. elongating the material layer whose volume is to be measured by a factor of at least about four; d. differentially coloring the material layer whose volume is to be measured so that its boundaries are relatively sharply defined; and e. measuring the axial extent of the elongated, differentially colored material layer while the mixture remains in the tube.
Claim 5
Independent Claim
120 words
A method of determining the approximate volume of a constituent material layer in a material mixture having at least two adjacent material layers of different densities, said method comprising the steps of: a. drawing the material mixture into a transparent tube; b. centrifuging the material mixture in the tube so as to layer out the material layers according to specific gravity; c. elongating the material layer whose volume is to be measured by a factor of at least about four; d. differentially coloring the material layer whose volume is to be measured so that its boundaries are relatively sharply defined; and e. measuring the axial extent of the elongated, differentially colored material layer while the mixture remains in the tube.
Claim 6
Dependent Claim
14 words
The method of claim 3, wherein said elongating and centrifuging steps are performed concurrently.
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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |