US4259540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filled cables
Assignee: AT&T Inc
•
Filing: 1979-04-20
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Granted: 1981-03-31
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Expires: 1999-04-20
Abstract
Abstract An improved filling material having superior handling characteristics and useful for waterproofing electrical cables is disclosed. The material is a styrene-ethylene butylene styrene block copolymer dissolved in a naphthenic or paraffinic oil, with polyethylene added for consistency.
Inventors
- 👤 Raffaele A. Sabia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:47
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285; C; C08; C08L; C08L53/00; C08L53/02; C08L53/025; H01B3/00; H01B3/18; H01B3/20; H01B3/22; H01B3/30; H01B3/44; H01B3/441; Y; Y02; Y02A; Y02A30/00; Y02A30/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
A cable comprising: a plurality of conductors contained within a sheath leaving voids between the conductors, and between the conductors and the sheath, and a filling material filling the voids the invention characterized in that the filling material comprises a mixture of: (X) an ASTM Type 103, 104A or 104B, or mixtures thereof, (paraffinic or naphthenic) oil, having a minimum sp. gr. of 0.860, a minimum SUS viscosity at 210 degrees F. of 45, a maximum pour point ASTM D 97 of 20 degrees F. and a maximum of 5 percent aromatic oils, (Y) a styrene-ethylene butylene-styrene block copolymer having a styrene-rubber ratio of approximately 0.2 to 0.5, (Z) polyethylene having a softening point of 110 degrees C. to 130 degrees C. the ingredients X, Y and Z having relative proportions falling within the shaded area bounded by ABCDEF of the FIGURE.
Claim 2
Dependent Claim
142 words
A cable comprising: a plurality of conductors contained within a sheath leaving voids between the conductors, and between the conductors and the sheath, and a filling material filling the voids the invention characterized in that the filling material comprises a mixture of: (X) an ASTM Type 103, 104A or 104B, or mixtures thereof, (paraffinic or naphthenic) oil, having a minimum sp. gr. of 0.860, a minimum SUS viscosity at 210 degrees F. of 45, a maximum pour point ASTM D 97 of 20 degrees F. and a maximum of 5 percent aromatic oils, (Y) a styrene-ethylene butylene-styrene block copolymer having a styrene-rubber ratio of approximately 0.2 to 0.5, (Z) polyethylene having a softening point of 110 degrees C. to 130 degrees C. the ingredients X, Y and Z having relative proportions falling within the shaded area bounded by ABCDEF of the FIGURE.
Claim 3
Dependent Claim
12 words
The cable of claim 1 in which the conductors are electrical conductors.
Claim 4
Dependent Claim
12 words
The cable of claim 1 in which the conductors are light conductors.
Claim 5
Dependent Claim
17 words
The cable of claim 1 in which the filling material additionally contains 0.2-2% of a syneresis inhibitor.
Claim 6
Dependent Claim
14 words
The cable of claim 4 in which the filling material additionally contains an antioxidant.
Claim 7
Dependent Claim
13 words
The cable of claim 5 in which the styrene-rubber ratio is approximately 0.4.
Claim 8
Dependent Claim
107 words
An encapsulating compound comprising a mixture of: (X) an ASTM Type 103, 104A or 104B, or mixtures thereof, (paraffinic or naphthenic) oil, having a minimum sp. gr. of 0.860, a minimum SUS viscosity at 210 degrees F. of 45, a maximum pour point ASTM D 97 of 20 degrees F. and a maximum of 5 percent aromatic oils, (Y) a styrene-ethylene butylene-styrene block copolymer having a styrene-rubber ratio of approximately 0.2 to 0.5, (Z) polyethylene having a softening point of 110 degrees C. to 130 degrees C., the ingredients X, Y and Z having relative proportions falling within the shaded area bounded by ABCDEF of the FIGURE.
Claim 9
Dependent Claim
107 words
An encapsulating compound comprising a mixture of: (X) an ASTM Type 103, 104A or 104B, or mixtures thereof, (paraffinic or naphthenic) oil, having a minimum sp. gr. of 0.860, a minimum SUS viscosity at 210 degrees F. of 45, a maximum pour point ASTM D 97 of 20 degrees F. and a maximum of 5 percent aromatic oils, (Y) a styrene-ethylene butylene-styrene block copolymer having a styrene-rubber ratio of approximately 0.2 to 0.5, (Z) polyethylene having a softening point of 110 degrees C. to 130 degrees C., the ingredients X, Y and Z having relative proportions falling within the shaded area bounded by ABCDEF of the FIGURE.
Claim 10
Dependent Claim
13 words
The compound of claim 7 in which the styrene-rubber ratio is approximately 0.4.
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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |