US3238280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous coatings for electrical conductors and method of forming
Assignee: General Electric Co
•
Filing: 1962-07-02
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Granted: 1966-03-01
•
Expires: 1982-07-02
Abstract
No abstract record available.
Inventors
- 👤 Willard F M Gray
- 👤 John L Mcmurphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:45
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/02; H01B13/00; H01B13/06; H01B13/08; H01B13/22; H01B13/26; H01B13/2606
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A METHOD OF FORMING A POROUS COATING ON AN ELECTRICAL CONDUCTOR FOR USE IN FLUID FILLED ELECTRICAL APPARATUS WHEREIN SAID COATING WILL HAVE A VOLTAGE GRADIENT OF AT LEAST 1000 VOLTS PER MIL COMPRISING THE STEPS OF (1) WRAPPING A PLURALITY OF FILAMENTS OF MATERIAL ABOUT A BARE ELECTRICAL CONDUCTOR, AND (2) FLATTENING SAID WRAPPED FILAMENTS TO REDUCE THEIR BUILD AND FORM A TIGHT, POROUS COATING ABOUT THE ELECTRICAL CONDUCTOR, THE PORES OF SAID COATING BEING NOT MORE THAN 3 MILS IN AT LEAST ONE DIMENSION.
Claim 2
Independent Claim
86 words
A METHOD OF FORMING A POROUS COATING ON AN ELECTRICAL CONDUCTOR FOR USE IN FLUID FILLED ELECTRICAL APPARATUS WHEREIN SAID COATING WILL HAVE A VOLTAGE GRADIENT OF AT LEAST 1000 VOLTS PER MIL COMPRISING THE STEPS OF (1) WRAPPING A PLURALITY OF FILAMENTS OF MATERIAL ABOUT A BARE ELECTRICAL CONDUCTOR, AND (2) FLATTENING SAID WRAPPED FILAMENTS TO REDUCE THEIR BUILD AND FORM A TIGHT, POROUS COATING ABOUT THE ELECTRICAL CONDUCTOR, THE PORES OF SAID COATING BEING NOT MORE THAN 3 MILS IN AT LEAST ONE DIMENSION.
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |