US3792192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical cable
Assignee: ANACONDA ACQUISITION Co
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Filing: 1972-12-29
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Granted: 1974-02-12
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Expires: 1992-12-29
Abstract
Abstract An electric power cable comprises extruded strand shielding and an inner layer of rubber insulation such as ethylene-propylene copolymer or ethylene-propylene-diene terpolymer rubber bonded by cross-linking to an outer layer of cross-linked polyethylene insulation.
Inventors
- 👤 W Plate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:15
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/02; H01B7/0275; H01B13/00; H01B13/06; H01B13/14; H01B9/00; H01B9/02; H01B9/026; H01B9/027
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
12 words
The cable of claim 1 wherein said rubber layer comprises ethylene-propylene copolymer.
Claim 2
Dependent Claim
12 words
The cable of claim 1 wherein said rubber layer comprises ethylene-propylene-diene terpolymer.
Claim 3
Dependent Claim
27 words
The cable of claim 2 wherein said copolymer comprises filler material blended therewith, thereby increasing the specific inductive capacitance of said copolymer to a value above 3.
Claim 4
Dependent Claim
27 words
The cable of claim 3 wherein said terpolymer comprises filler material blended therewith, thereby increasing the specific inductive capacitance of said terpolymer to a value above 3.
Claim 5
Dependent Claim
20 words
The cable of claim 1 wherein said layers of insulation bond to each other at their interface by molecular cross-linking.
Claim 6
Dependent Claim
15 words
The cable of claim 6 wherein said layers of insulation comprise a common cross-linking agent.
Claim 7
Dependent Claim
13 words
The cable of claim 7 wherein said agent comprises di- Alpha -cumyl peroxide.
Claim 8
Dependent Claim
19 words
The cable of claim 1 wherein said jacket comprises a semiconducting composition applied directly over said layer of polyethylene.
Claim 9
Dependent Claim
166 words
An electric cable comprising: A. a metallic conductor, B. an inner layer of rubber-based insulating composition surrounding said conductor, said composition having a 100 percent modulus at 130* C of at least 50 percent of the 100 percent modulus of said composition at 25* C, C. an outer layer of vulcanized polymer-based insulating composition surrounding said inner layer, a. said outer layer bonding to said inner layer, b. said outer layer composition having a 100 percent modulus at room temperature substantially higher than the 100 percent modulus at room temperature of said iNner layer composition, c. said outer layer composition having a 100 percent modulus at 130* C substantially lower than said 100 percent modulus at 130* C of said inner layer composition, and d. the modulus at 130* C of said outer layer composition not exceeding one-third of the modulus at 25* C of said outer layer composition, and e. said inner and said outer layers together totaling at least 250 mils in radial thickness.
Claim 10
Dependent Claim
25 words
The cable of claim 10 comprising a layer of semiconducting strand shielding surrounding said conductor under said inner layer and bonding to said inner layer.
Claim 11
Dependent Claim
44 words
The cable of claim 10 wherein said inner layer composition comprises filler material blended therewith, thereby increasing the specific inductive capacitance of said inner layer composition to a value above 3, said value substantially exceeding the specific inductive capacitance of said outer layer composition.
Claim 12
Dependent Claim
17 words
The cable of claim 10 wherein said inner and outer layer compositions comprise a common cross-linking agent.
Claim 13
Dependent Claim
17 words
The cable of claim 12 wherein said inner and outer layer compositions comprise a common cross-linking agent.
Claim 14
Dependent Claim
15 words
The cable of claim 10 comprising a semiconducting polymeric jacket directly surrounding said outer layer.
Claim 15
Dependent Claim
14 words
The cable of claim 14 wherein said cross-linking agent comprises di- Alpha -cumyl peroxide.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |