US3666876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel compositions with controlled electrical properties
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-07-17
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Granted: 1972-05-30
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Expires: 1990-07-17
Abstract
Abstract An electrical conductor shielded with an insulating coating comprising a semi-conductive material of a polymer having a dielectric constant of at least 2.0 and a filler selected from the group consisting of electrically conductive metals and their alloys, said filler having a particle size range of about 0.05 to about 50 microns, said particles having an approximately linear distribution of particle size with an average particle size of about 1 to about 20 microns.
Inventors
- 👤 Eric O Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:20
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/002; H01B3/004; H01B9/00; H01B9/02; H01B9/027
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
138 words
a filler selected from the group consisting of electrically conductive metals and their alloys, said filler having a particle size range of about 0.05 to about 50 microns, said particles having an approximately linear distribution of particle sizes with an average particle size of about 1 to about 30 microns, wherein said first insulating semi-conductor coating comprises about 20 to about 40 wt. percent, based on the total composition of filler; c. a series of additional insulating coatings laid one upon the other over the first insulating coating, said additional coatings comprising the semi-conductor composition of (b) (1) and (2); each succeeding coating containing about 10 to about 30 wt. percent more filler than the preceding coating up to a maximum of about 90 wt. percent based on the total composition; and d. a final outer conductive coating.
Claim 2
Dependent Claim
65 words
The composition of claim 1 wherein the final outer coating comprises: a. a polymer having a dielectric constant of at least 2.0; and b. about 80 to about 90 wt. percent based on the total composition of a filler selected from the group consisting of electrically conductive metals and their alloys, said filler having a particle size range of about 0.05 to about 200 microns.
Claim 3
Dependent Claim
138 words
a filler selected from the group consisting of electrically conductive metals and their alloys, said filler having a particle size range of about 0.05 to about 50 microns, said particles having an approximately linear distribution of particle sizes with an average particle size of about 1 to about 30 microns, wherein said first insulating semi-conductor coating comprises about 70 to about 90 wt. percent based on the total composition of filler; b. a series of additional layers of semi-conductor composition laid one upon the other over said first layer, said additional layers comprising the composition of (a) (1) and (2); each of said additional layers containing about 10 to about 30 wt. percent less filler than the preceding layers; and c. a final outer layer of said semi-conductor composition containing about 20 to about 40 wt. percent filler.
Claim 4
Dependent Claim
48 words
The composition of claim 2 wherein the filler is present at about 90 wt. percent and has a particle size range of about 0.05 to about 50 microns, said particles having a linear distribution of particle size with an average size of about 1 to about 30 microns.
Claim 5
Dependent Claim
25 words
An insulated conductor which comprises an electrically conductive conductor insulated with a semi-conductor coating composition comprising: a. a first layer of the semi-conductor composition comprising:
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |