US4152600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear radiation moisture gauge calibration standard
Assignee: Troxler Electronic Laboratories Inc
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Filing: 1976-10-21
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Granted: 1979-05-01
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Expires: 1996-10-21
Abstract
Abstract A hydrophobic standard for calibrating nuclear radiation moisture gauges. In accordance with this invention, each standard has physical characteristics and dimensions effective for representing to a nuclear gauge undergoing calibration an infinite mass of homogeneous hydrogen content. Calibration standards are disclosed which are suitable for use with surface gauges and with depth gauges.
Inventors
- 👤 Richard L. Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:09
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/09
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
70 words
A hydrophobic calibration standard for thermal neutron moisture gauges comprising at least one body formed of a moderating material containing hydrogen in the molecular structure thereof and a substantially non-moderating material, with the materials arranged for a substantially uniform distribution of moderating material throughout the at least one body so as to impart thereto physical characteristics effective for representing a mass of homogenous hydrogen content to a gauge undergoing calibration.
Claim 2
Dependent Claim
70 words
A hydrophobic calibration standard for thermal neutron moisture gauges comprising at least one body formed of a moderating material containing hydrogen in the molecular structure thereof and a substantially non-moderating material, with the materials arranged for a substantially uniform distribution of moderating material throughout the at least one body so as to impart thereto physical characteristics effective for representing a mass of homogenous hydrogen content to a gauge undergoing calibration.
Claim 3
Dependent Claim
21 words
A standard means according to claim 1 having physical dimensions effective for representing an infinite mass to a gauge undergoing calibration.
Claim 4
Dependent Claim
21 words
A standard means according to claim 1 comprising a body of material having a planar surface for receiving a surface gauge.
Claim 5
Dependent Claim
21 words
A standard means according to claim 1 comprising a body of material having a bore therein for receiving a depth gauge.
Claim 6
Dependent Claim
38 words
A hydrophobic standard means for calibrating thermal neutron moisture gauges comprising a plurality of bodies each effective for representing a corresponding, discrete hydrogen content to a gauge undergoing calibration for thereby providing a corresponding plurality of calibration points.
Claim 7
Dependent Claim
38 words
A hydrophobic standard means for calibrating thermal neutron moisture gauges comprising a plurality of bodies each effective for representing a corresponding, discrete hydrogen content to a gauge undergoing calibration for thereby providing a corresponding plurality of calibration points.
Claim 8
Dependent Claim
34 words
A hydrophobic calibration standard for nuclear radiation moisture gauges comprising a body of superposed interleaved thin layers of a moderating material containing hydrogen in the molecular structure thereof and of a substantially non-moderating material.
Claim 9
Dependent Claim
34 words
A hydrophobic calibration standard for nuclear radiation moisture gauges comprising a body of superposed interleaved thin layers of a moderating material containing hydrogen in the molecular structure thereof and of a substantially non-moderating material.
Claim 10
Dependent Claim
21 words
A standard according to claim 6 wherein said layers of moderating and non-moderating material have a substantially constant, substantially uniform thickness.
Claim 11
Dependent Claim
33 words
A standard according to claim 7 wherein said layers of moderating material alternate with said layers of non-moderating material for sandwiching layers of one material between pairs of layers of the other material.
Claim 12
Dependent Claim
43 words
A standard according to claim 7 wherein the number of layers of one material is a multiple of the number of layers of the other material for sandwiching layers of the other material between sets of multiple adjacent layers of the one material.
Claim 13
Dependent Claim
25 words
A standard according to claim 9 wherein the number of layers of non-moderating material is a multiple of the number of layers of moderating material.
Claim 14
Dependent Claim
39 words
A standard according to claim 6 wherein said layers of moderating material have a substantially constant, substantially uniform first thickness and said layers of non-moderating material have a substantially constant, substantially uniform second thickness differing from said first thickness.
Claim 15
Dependent Claim
22 words
A standard according to claim 6 wherein said moderating material is a polymer film and said non-moderating material is a metal sheet.
Claim 16
Dependent Claim
15 words
A standard according to claim 12 wherein said moderating material is a hydrocarbon polymer film.
Claim 17
Dependent Claim
16 words
A standard according to claim 6 further comprising fastener means for clamping said layers into engagement.
Claim 18
Dependent Claim
77 words
A hydrophobic calibration standard for nuclear radiation moisture gauges comprising a plurality of thin layers of a hydrocarbon polymer effective for moderating neutrons, a plurality of thin layers of a non-moderating material arranged in interleaved superposed relation with said polymer layers, and fastener means for clamping said layers into engagement, said layers together forming a body having physical characteristics and dimensions effective for representing to a nuclear gauge undergoing calibration an infinite mass of homogeneous hydrogen content.
Claim 19
Dependent Claim
77 words
A hydrophobic calibration standard for nuclear radiation moisture gauges comprising a plurality of thin layers of a hydrocarbon polymer effective for moderating neutrons, a plurality of thin layers of a non-moderating material arranged in interleaved superposed relation with said polymer layers, and fastener means for clamping said layers into engagement, said layers together forming a body having physical characteristics and dimensions effective for representing to a nuclear gauge undergoing calibration an infinite mass of homogeneous hydrogen content.
Claim 20
Dependent Claim
20 words
A standard according to claim 15 wherein said polymer layers are of polyethylene and said non-moderating layers are of magnesium.
References Cited (Backward Citations)
US3681595A
Cited
US3867638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |