US3274320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of encapsulating transformer
Assignee: McGraw Edison Co
•
Filing: 1963-07-29
•
Granted: 1966-09-20
•
Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Reber Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:37
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/022; B; B29; B29C; B29C39/00; B29C39/02; B29C39/10; B29C39/22; B29C39/42; B29C70/00; B29C70/68; B29C70/72; H01F41/00; H01F41/005; B29L; B29L2031/00; B29L2031/30; B29L2031/3055; B29L2031/3061; B29L2031/34; B29L2031/3406; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T29/49075; Y10T29/49078
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN THE METHOD OF CONSTRUCTING AN ELECTRICAL TRANSFORMER INCLUDING A MAGNETIC CORE LINKED BY AN ENCAPSULATED CYLINDRICAL COIL HAVING CONCENTRIC LAYERS OF CONDUCTOR TURNS, THE STEPS OF PROVIDING POROUS INSULATION BETWEEN SAID CONDUCTOR LAYERS OF SAID COIL, IMMERSING SAID COIL IN A LIQUID INSULATING DIELECTRIC IMPREGNANT, WHEREBY SAID IMPREGNANT DISPLACES AIR WITHIN THE INTERSTICES OF SAID COIL, DRAINING SAID LIQUID IMPREGNANT FROM SAID COIL EXCEPT THAT RETAINED BY CAPILLARY ATTRACTION WITHIN THE INTERSTICES IN SAID POROUS INSULATION, ENVELOPING SAID COIL IN THERMOSETTING ENCAPSULATING RESIN IN LIQUID FORM, AND CURING SAID THERMOSETTING RESIN.
Claim 2
Dependent Claim
92 words
IN THE METHOD OF CONSTRUCTING AN ELECTRICAL TRANSFORMER INCLUDING A MAGNETIC CORE LINKED BY AN ENCAPSULATED CYLINDRICAL COIL HAVING CONCENTRIC LAYERS OF CONDUCTOR TURNS, THE STEPS OF PROVIDING POROUS INSULATION BETWEEN SAID CONDUCTOR LAYERS OF SAID COIL, IMMERSING SAID COIL IN A LIQUID INSULATING DIELECTRIC IMPREGNANT, WHEREBY SAID IMPREGNANT DISPLACES AIR WITHIN THE INTERSTICES OF SAID COIL, DRAINING SAID LIQUID IMPREGNANT FROM SAID COIL EXCEPT THAT RETAINED BY CAPILLARY ATTRACTION WITHIN THE INTERSTICES IN SAID POROUS INSULATION, ENVELOPING SAID COIL IN THERMOSETTING ENCAPSULATING RESIN IN LIQUID FORM, AND CURING SAID THERMOSETTING RESIN.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |