US3904541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission cable filling compound
Assignee: Hexcel Corp
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Filing: 1973-07-13
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Granted: 1975-09-09
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Expires: 1993-07-13
Abstract
Abstract Communication transmission cable, method of protecting a transmission cable, and composition for such method are provided, whereby a cable filling composition for transmission cable is employed which is a combination of a low molecular weight polymerization product of a C4 1-olefin and an insoluble, substantially inert powdered resin, which is either naturally occurring or synthetic cellulosic material, an addition polymer which is hydrocarbon or substituted hydrocarbon, or a condensation polymer. The product has good rheological properties, low dielectric constant, and low dissipation factor, while having no detrimental effect on the other materials present in the transmission cable.
Inventors
- 👤 John R Charlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:43
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
In a communication transmission cable, having a plurality of conducting wires and an outer sheath, the improvement which comprises having the voids between the conducting wires and the outer sheath filled with a composition having 10 to 50 parts by weight of a polybutene polymer having a viscosity at 20*C in the range of 500-20,000 S.U.S. and from 90 to 50 parts by weight of an inert, polybutene insoluble polymeric powder having a dielectric constant of less than 5 and a softening temperature above about 150*F, wherein said insoluble polymeric powder is selected from the group consisting of cellulosic materials and addition polymers of ethylene, propylene, vinyl acetate and vinyl chloride.
Claim 2
Dependent Claim
111 words
In a communication transmission cable, having a plurality of conducting wires and an outer sheath, the improvement which comprises having the voids between the conducting wires and the outer sheath filled with a composition having 10 to 50 parts by weight of a polybutene polymer having a viscosity at 20*C in the range of 500-20,000 S.U.S. and from 90 to 50 parts by weight of an inert, polybutene insoluble polymeric powder having a dielectric constant of less than 5 and a softening temperature above about 150*F, wherein said insoluble polymeric powder is selected from the group consisting of cellulosic materials and addition polymers of ethylene, propylene, vinyl acetate and vinyl chloride.
Claim 3
Dependent Claim
52 words
In a transmission cable, according to claim 1, wherein said composition has from about 20 to 50 parts by weight of said polybutene resin and from 80 to 50 parts by weight of said powder, and wherein said powder is of an average size in the range of 5 to 100 microns.
Claim 4
Dependent Claim
37 words
In a transmission cable according to claim 1, wherein said powder is an addition polymer of ethylene, propylene, vinyl acetate, vinyl chloride or copolymers thereof having a particle size in the range of 10 to 50 microns.
Claim 5
Dependent Claim
27 words
In a transmission cable according to claim 1, wherein said powder is a cellulosic material having a particle size in the range of 10 to 50 microns.
Claim 6
Dependent Claim
91 words
A COMPOSITION USEFUL AS A FILLER IN COMMUNICATION TRANSMISSION CABLES COMPRISING FROM 10 TO 50 PARTS OF A POLYBUTENE RESIN HAVING A VISCOSITY IN THE RANGE OF 500-20,000 S. U. S. AT 42*C AND FROM 50 TO 90 PARTS BY WEIGHT OF AN INERT POLYMERIC POWER OF FROM 5 TO 100 MICRONS MESH SIZE HAVING A SOFTENING TEMPERATURE ABOVE 150*F AND A DIELECTRIC CONSTANT BELOW ABOUT 5, WHEREIN SAID POLYMERIC POWDER IS SELECTED FROM THE GROUP CONSISTING OF CELLULOSIC MATERIALS AND ADDITION POLYMERS OF ETHYLENE, PROPYLENE, VINYL ACETATE AND VINYL CHLORIDE.
Claim 7
Dependent Claim
91 words
A COMPOSITION USEFUL AS A FILLER IN COMMUNICATION TRANSMISSION CABLES COMPRISING FROM 10 TO 50 PARTS OF A POLYBUTENE RESIN HAVING A VISCOSITY IN THE RANGE OF 500-20,000 S. U. S. AT 42*C AND FROM 50 TO 90 PARTS BY WEIGHT OF AN INERT POLYMERIC POWER OF FROM 5 TO 100 MICRONS MESH SIZE HAVING A SOFTENING TEMPERATURE ABOVE 150*F AND A DIELECTRIC CONSTANT BELOW ABOUT 5, WHEREIN SAID POLYMERIC POWDER IS SELECTED FROM THE GROUP CONSISTING OF CELLULOSIC MATERIALS AND ADDITION POLYMERS OF ETHYLENE, PROPYLENE, VINYL ACETATE AND VINYL CHLORIDE.
Claim 8
Dependent Claim
37 words
A composition according to claim 5, wherein said powder is of a size in the range of 10 to 50 microns and is an addition polymer of ethylene, propylene, vinyl chloride or vinyl acetate and copolymers thereof.
Claim 9
Dependent Claim
26 words
A composition according to claim 5, wherein said powder is of a size in the range of 10 to 50 microns and is a cellulosic material.
Claim 10
Dependent Claim
34 words
A method for protecting a communications transmission cable from internal corrosion which comprises: introducing into said cable so as to substantially fill all the voids in said cable, a composition according to claim 5.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |