US4184972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetodielectric material
Assignee: Individual
•
Filing: 1978-07-31
•
Granted: 1980-01-22
•
Expires: 1998-07-31
Abstract
Abstract The invention contemplates an iron-based magnetodielectric material comprising a thermoreactive binder in the form of modified and non-modified phenol formaldehyde resins, and a filler in the form of a fibrous filler preliminarily impregnated with said resins, the components being used in the following quantities, in % by weight: thermoreactive binder--8 to 25 impregnated fibrous filler--5 to 20 lubricant--0.5 to 1.5 iron--the balance.
Inventors
- 👤 Lev V. Pevzner
- 👤 Alexandr N. Ustkachkintsev
- 👤 Boris V. Yakobson
- 👤 Andrei V. Timofeev
- 👤 Anna A. Furman
- 👤 Sergei E. Vaskanov
- 👤 Vadim V. Alexeevsky
- 👤 Jury S. Chatinian
- 👤 Felix K. Makarov
- 👤 Vladimir I. Radin
- 👤 Viktor M. Petrov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:53
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
60 words
A homogeneous iron-based magnetodielectric material comprising a thermoreactive binder in the form of modified and non-modified phenol formaldehyde resins, and a filler in the form of a fibrous filler preliminarily impregnated with said resins, the components being used in the following quantities, in % by weight: thermoreactive binder--8 to 25 impregnated fibrous filler--5 to 20 lubricant--0.5 to 1.5 iron--the balance.
Claim 2
Dependent Claim
60 words
A homogeneous iron-based magnetodielectric material comprising a thermoreactive binder in the form of modified and non-modified phenol formaldehyde resins, and a filler in the form of a fibrous filler preliminarily impregnated with said resins, the components being used in the following quantities, in % by weight: thermoreactive binder--8 to 25 impregnated fibrous filler--5 to 20 lubricant--0.5 to 1.5 iron--the balance.
Claim 3
Dependent Claim
19 words
A magnetodielectric material according to claim 1, wherein the modifier for phenol formaldehyde resins comprises polyolefins and their derivatives.
Claim 4
Dependent Claim
16 words
A magnetodielectric material according to claim 1, wherein the modifier for phenol formaldehyde resins comprises polyvinylacetal.
Claim 5
Dependent Claim
16 words
A magnetodielectric material according to claim 1, wherein the modifier for phenol formaldehyde resins comprises colophony.
Claim 6
Dependent Claim
20 words
A magnetodielectric material according to claim 1, wherein the amount of modifiers vary from 10-30% by weight of the resin.
Claim 7
Dependent Claim
22 words
A magnetodielectric material according to claim 1, wherein the lubricant is selected form the group consisting of fatty acids and their salts.
Claim 8
Dependent Claim
24 words
A magnetodielectric material according to claim 6, wherein the lubricant is selected from the group consisting of oleic acid, stearic acid and calcium stearate.
Claim 9
Dependent Claim
22 words
A magnetodielectric material according to claim 1, wherein the filler is selected from the group consisting of asbestos, glass, and synthetic fibers.
References Cited (Backward Citations)
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US3228881A
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US3360475A
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US3740266A
Cited
US3625760A
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US4040971A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |