US3683303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound for electric devices
Assignee: Individual
•
Filing: 1970-08-06
•
Granted: 1972-08-08
•
Expires: 1990-08-06
Abstract
Abstract A method providing for the reduction of noise originating from core-and-coil elements of electrical devices by encasing the core-and-coil elements within a chemical compound combination comprising at least two organic compounds, the combination having large d-loss factor values at starting and stabilization temperatures, respectively, of the core-and-coil elements. A typical mixture comprises an unsaturated polyester and a polyurethane.
Inventors
- 👤 Hiroyoshi Ayano
- 👤 Yasuaki Kibino
- 👤 Hiroyoshi Sato
- 👤 Yukihiko Ohta
- 👤 Minoru Fukuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:35
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/165; C; C08; C08L; C08L67/00; C08L67/06; C08L75/00; C08L75/04; H; H01; H01F; H01F27/00; H01F27/02; H01F27/022; H01F27/33
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
In an electric device having a core-and-coil element which generates undesirable noises resulting from vibrational energy induced by electromagnetic forces inherent in said device, a material disposed around said core-and-coil element for reducing said noises, said material comprising a physical combination of a first organic member selected from the group consisting of polyurethane resins and a second organic member selected from the group consisting of unsaturated polyester resins.
Claim 2
Dependent Claim
68 words
In an electric device having a core-and-coil element which generates undesirable noises resulting from vibrational energy induced by electromagnetic forces inherent in said device, a material disposed around said core-and-coil element for reducing said noises, said material comprising a physical combination of a first organic member selected from the group consisting of polyurethane resins and a second organic member selected from the group consisting of unsaturated polyester resins.
Claim 3
Dependent Claim
17 words
The electric device of claim 1 wherein said first organic member contains castor oil as polyol component.
Claim 4
Dependent Claim
58 words
The electric device of claim 1 wherein the first organic member has a maximum d loss factor value greater than 0.06 in the starting temperature range of from 0* to 30* C. and the second organic Member has a maximum d loss factor value greater than 0.06 in the stabilized temperature range of from 70* to 130* C.
Claim 5
Dependent Claim
28 words
The electric device of claim 1 which contains in addition to the first and second organic members and inorganic filler and an inorganic member containing water of crystallization.
Claim 6
Dependent Claim
57 words
The electric device of claim 4 wherein the inorganic filler is selected from the group consisting of calcium carbonate, clay, quartz, sand, silica powder and combinations thereof, and the inorganic member having water of crystallization is selected from the group consisting of CaO. 8H2O, SiO2. 8H2O, BaO. 8H2O, SnCl2. 8H2O, BaCl2. 2H2O, CuSO4. 3H2O and combinations thereof.
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |