US3902006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Junction box
Assignee: Rhone Progil SA
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Filing: 1972-11-15
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Granted: 1975-08-26
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Expires: 1992-11-15
Abstract
Abstract An easily shatterable dielectric insulating material is provided for junction boxes and other locations where it is desired to break the insulated material when it is necessary to intervene for modifying the junction. The insulating material, which has the good properties of good adherence to the electrical components regardless of temperature and which may be cast at ambient temperatures, comprises at least about 50 % by weight of coal tar pitch based on the total composition as well as a crosslinkable resin, a reactive diluent and a resin-hardening agent.
Inventors
- 👤 Bernard Gouteron
- 👤 Pierre Jay
- 👤 Jean-Philippe Rieux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:10
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/145; C08G59/18; C08G59/20; C08G59/32; C08G59/36; C08L; C08L63/00; C08L95/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
An electrical network junction box comprising an electrical juncture surrounded with a hardened easily frangible protective dielectric insulating potting composition, wherein the improvement comprises said easily frangible protective potting composition consisting essentially of a cross-linked mixture of a cross-linkable resin, a reactive diluent, a hardening agent and coal tar pitch, said coal tar pitch constituting at least about 50 percent of the total weight of the mixture and said crosslinkable resin constituting 10-30 percent of the total weight of the mixture.
Claim 2
Dependent Claim
81 words
An electrical network junction box comprising an electrical juncture surrounded with a hardened easily frangible protective dielectric insulating potting composition, wherein the improvement comprises said easily frangible protective potting composition consisting essentially of a cross-linked mixture of a cross-linkable resin, a reactive diluent, a hardening agent and coal tar pitch, said coal tar pitch constituting at least about 50 percent of the total weight of the mixture and said crosslinkable resin constituting 10-30 percent of the total weight of the mixture.
Claim 3
Dependent Claim
31 words
A junction box in accordance with claim 1 wherein said cross-linkable resin is selected from the group consisting of di- and tri-epoxide resins, and said reactive diluent is a monoepoxide compound.
Claim 4
Dependent Claim
29 words
A junction box in accordance with claim 2 wherein said cross-linkable resin is the diglycidyl ether of 4,4''-diphenylolpropane or trimethylolpropane triglycidyl ether, and said reactive diluent is styrene oxide.
Claim 5
Dependent Claim
27 words
A junction box in accordance with claim 1, wherein said easily frangible protective potting composition further includes an adjuvant of hardening accelerating agents or adhesive improving agents.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |