US4592955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating covering for strand material
Assignee: AT&T Inc
•
Filing: 1984-10-31
•
Granted: 1986-06-03
•
Expires: 2004-10-31
Abstract
Abstract A telephone cord employs as an insulator for the conductors therein an extrudable blend of a styrene-ethylenebutylene-styrene copolymer with polypropylene.
Inventors
- 👤 Jae H. Choi
- 👤 William M. Kanotz
- 👤 William C. Vesperman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:29
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/2958; Y10T428/296
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
30 words
A strand material having an insulating convering thereover, said covering comprising an extruded blend of a styrene-ethylenebutylene-styrene copolymer with a mixture of low melt index and high melt index polypropylenes.
Claim 2
Dependent Claim
30 words
A strand material having an insulating convering thereover, said covering comprising an extruded blend of a styrene-ethylenebutylene-styrene copolymer with a mixture of low melt index and high melt index polypropylenes.
Claim 3
Dependent Claim
38 words
The strand material recited in claim 1, wherein the chainlength of the styrene portion of the copolymer exceeds the chainlength of the ethylenebutylene portion and wherein the copolymer comprises > 10 to <20 weight parts of the blend.
Claim 4
Dependent Claim
39 words
The strand material recited in claim 2, wherein the low melt index polypropylene comprises from >10 to <20 weight parts of the blend and the high melt index polypropylene comprises from >50 to <80 weight parts of the blend.
Claim 5
Dependent Claim
18 words
The strand material recited in claim 3, wherein the melt indices of the polypropylene are 1 and 12.
Claim 6
Dependent Claim
18 words
The strand material recited in claim 1, said covering further comprising color concentrate, peroxide decomposer, stabilizer and antioxidant.
Claim 7
Dependent Claim
18 words
The strand material recited in claim 3, said covering further comprising color concentrate, peroxide decomposer, stabilizer and antioxidant.
Claim 8
Dependent Claim
62 words
A strand material having an insulating covering thereover, said covering comprising an extruded blend of from >10 to <20 weight parts of a styrene-ethylenebutylene-styrene copolymer wherein the length of the styrene chains exceeds the length of the ethylenebutylene chain, >10 to <20 weight parts of a low melt index polypropylene and >50 to <80 weight parts of a high melt index polypropylene.
Claim 9
Dependent Claim
62 words
A strand material having an insulating covering thereover, said covering comprising an extruded blend of from >10 to <20 weight parts of a styrene-ethylenebutylene-styrene copolymer wherein the length of the styrene chains exceeds the length of the ethylenebutylene chain, >10 to <20 weight parts of a low melt index polypropylene and >50 to <80 weight parts of a high melt index polypropylene.
Claim 10
Dependent Claim
18 words
The strand material recited in claim 7, wherein the melt indices of the polypropylene are 1 and 12.
Claim 11
Dependent Claim
46 words
The strand material recited in claim 7, wherein the insulating material is extruded from a blend consisting essentially of: 11 to 14 weight parts of the copolymer; 12 to 16 weight parts melt index 1 polypropylene; and 65 to 75 weight parts melt index 12 polypropylene.
Claim 12
Dependent Claim
56 words
The strand, material recited in claim 9, said covering further comprising: 2.5 to 4.5 weight parts polyethylene color concentrate; 0.1 to 0.15 weight parts epoxy resin; 0.01 to 0.06 weight parts antioxidant; 0.05 to 0.15 weight parts peroxide decomposer; 0 01 to 0.1 weight parts copper type inhibitor; and 0.3 to 0.5 weight parts naphthenic oil.
References Cited (Backward Citations)
US19019A
Cited
USRE19019E
Cited
US2418978A
Cited
US3643004A
Cited
US4176240A
Cited
US4259540A
Cited
US4324453A
Cited
US4464013A
Cited
US4497538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |