US4125645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latex modified pulp insulated conductors
Assignee: Nordx CDT Inc
•
Filing: 1975-09-29
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Granted: 1978-11-14
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Expires: 1995-09-29
Abstract
Abstract A pulp insulated electric communications conductor in which the wood pulp fibers of the insulation are coated with an aqueous cationic deposition aid polymer and then an aqueous based anionic latex polymer. In a process for applying a layer of insulating material to the conductor a slurry of wood pulp fibers is prepared to which first an aqueous based cationic deposition aid polymer is added and then an aqueous based anionic latex polymer is added, the resultant coated wood pulp fibers being applied to the conductor.
Inventors
- 👤 John A. Jukes
- 👤 Thomas C. Pound
- 👤 Wayne A. Cascarano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:45
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/48; H01B3/52; H01B13/00; H01B13/06; H01B13/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
A process for insulating an electric wire conductor comprising, in sequence, the steps of: preparing a fibre slurry, where the fibers consist substantially of wood pulp fibers; adding to the slurry a solution of an aqueous based cationic deposition aid polymer; adding to the slurry containing the wood pulp and the deposition aid polymer an aqueous based anionic latex polymer to coat said fibers; and applying the coated wood pulp fibers to the conductor to form an insulative layer thereon.
Claim 2
Dependent Claim
80 words
A process for insulating an electric wire conductor comprising, in sequence, the steps of: preparing a fibre slurry, where the fibers consist substantially of wood pulp fibers; adding to the slurry a solution of an aqueous based cationic deposition aid polymer; adding to the slurry containing the wood pulp and the deposition aid polymer an aqueous based anionic latex polymer to coat said fibers; and applying the coated wood pulp fibers to the conductor to form an insulative layer thereon.
Claim 3
Dependent Claim
17 words
A process as claimed in claim 1 in which the latex polymer is an anionic acrylic latex.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1 in which the latex polymer is an anionic styrene butadiene latex.
Claim 5
Dependent Claim
37 words
A process as claimed in claim 1 in which the latex polymer is between 1% and 50% by weight of the fibers and the deposition aid polymer is between 0.3% and 1.0% by weight of the fibers.
Claim 6
Dependent Claim
33 words
A process as claimed in claim 1 in which the latex polymer is about 15% by weight of the fibers and the deposition aid polymer is about 0.4% by weight of the fibers.
Claim 7
Dependent Claim
20 words
A process as claimed in claim 1 including the step of additionally heating the insulative layer to expand the layer.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 1 in which the deposition aid polymer is a quarternary amino acrylic ester.
Claim 9
Dependent Claim
15 words
A process as claimed in claim 1 in which the deposition aid polymer is polyethylenimine.
Claim 10
Dependent Claim
26 words
A process as claimed in claim 1 in which the latex polymer is an acrylic and the deposition aid polymer is a quarternary amino acrylic ester.
Claim 11
Dependent Claim
22 words
A process as claimed in claim 1 in which the latex polymer is styrene butadiene and the deposition aid polymer is polyethylenimine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |