Patent US3202947A successfully refreshed from Google Patents.
US3202947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy insulated transformer having tris-beta-chloroethylphosphate and hydrated alumina in the insulation
Assignee: Jefferson Electric Co
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Filing: 1961-02-16
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Granted: 1965-08-24
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Expires: 1981-02-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Budovec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:20
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/022; H01B; H01B3/00; H01B3/002; H01B3/18; H01B3/30; H01B3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
AN ELECTRICAL TRANSFORMER COMPRISING A MAGNETIC CORE, ELECTRICAL WINDINGS DISPOSED ABOUT TEH MAGNETIC CORE, AND A CURED BODY OF RESINOUS INSULATION COMPRISING A MIXTURE OF 20-50 PERCENT OF THE REACTION PRODUCT HAVING MORE THAN ONE EPOXY GROUP PER MOLECULE OF EPICHLOROHYDRIN AND DIPHENYLOL PROPANE, 25-80 PERCENT OF A FILLER CONSISTING ESSENTIALLY OF HYDRATED ALUMINA, AND A FLAME RETARDANT COMPRISING 2-10 PERCENT TRIS-B-CHLORETHYL PHOSPHATE, 5-12 PERCENT OF HEXAHYDROPHTHALIC ANHYDRIDE, 0,005-1.0 PERCENT OF A TERTIARY AMINE FROM THE GROUP CONSISTING OF 2,4,6-TRI(DIETHYLAMINOMETHYL)-PHENOL AND DIMETHYLAMINOMETHYL PHENOL; AND 0-25 PERCENT CHLORENDIC ANHYDRIDE SAID CORE WINDINGS BEING EMBEDED IN SAID CURED BODY OF RESINOUS INSULATION.
Claim 2
Dependent Claim
100 words
AN ELECTRICAL TRANSFORMER COMPRISING A MAGNETIC CORE, ELECTRICAL WINDINGS DISPOSED ABOUT TEH MAGNETIC CORE, AND A CURED BODY OF RESINOUS INSULATION COMPRISING A MIXTURE OF 20-50 PERCENT OF THE REACTION PRODUCT HAVING MORE THAN ONE EPOXY GROUP PER MOLECULE OF EPICHLOROHYDRIN AND DIPHENYLOL PROPANE, 25-80 PERCENT OF A FILLER CONSISTING ESSENTIALLY OF HYDRATED ALUMINA, AND A FLAME RETARDANT COMPRISING 2-10 PERCENT TRIS-B-CHLORETHYL PHOSPHATE, 5-12 PERCENT OF HEXAHYDROPHTHALIC ANHYDRIDE, 0,005-1.0 PERCENT OF A TERTIARY AMINE FROM THE GROUP CONSISTING OF 2,4,6-TRI(DIETHYLAMINOMETHYL)-PHENOL AND DIMETHYLAMINOMETHYL PHENOL; AND 0-25 PERCENT CHLORENDIC ANHYDRIDE SAID CORE WINDINGS BEING EMBEDED IN SAID CURED BODY OF RESINOUS INSULATION.
References Cited (Backward Citations)
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |