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US4152271A
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Tracer-containing composition
Assignee: Micro Tracers Inc
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Filing: 1974-01-28
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Granted: 1979-05-01
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Expires: 1994-01-28
Abstract
Abstract A dry homogeneous admixture including a bulk material, a micro-ingredient, and a solid particulate tracer in a preselected ratio to the micro-ingredient, comprising a vehicle of ground iron or other ferromagnetic material that will become magnetized by a magnetic field, but loses its magnetism in the absence of such a field. The vehicle itself serves as the tracer when used with magnetic detection techniques. Additional tracers are provided by coating the vehicle with detectable coatings such as dyes.
Inventors
- 👤 Sylvan Eisenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:44
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/02; C; C06; C06B; C06B23/00; C06B23/008; C09; C09K; C09K3/00; G01N27/00; G01N27/72; Y; Y10; Y10S; Y10S149/00; Y10S149/123; Y10S252/00; Y10S252/965; Y10T; Y10T436/00; Y10T436/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A composition of matter in the form of a generally homogeneous admixture, said admixture being comprised of a major portion of a bulk ingredient, a minor portion of a micro-ingredient, and a tracer provided in a preselected ratio with said micro-ingredient, said tracer comprising a finely divided ferromagnetic material having a particle size of from about 20 to about 325 mesh.
Claim 2
Dependent Claim
61 words
A composition of matter in the form of a generally homogeneous admixture, said admixture being comprised of a major portion of a bulk ingredient, a minor portion of a micro-ingredient, and a tracer provided in a preselected ratio with said micro-ingredient, said tracer comprising a finely divided ferromagnetic material having a particle size of from about 20 to about 325 mesh.
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) | 1982-04-30 | 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 |