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US3747037A Expired / Lapsed US ⏱️ 0.0 years remaining

Petroleum based oil modified castor oil-urethane composition for electrical potting

Assignee: General Electric Co
•
Filing: 1971-11-15
•
Granted: 1973-07-17
•
Expires: 1991-11-15
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Abstract

Abstract A urethane composition potting compound having improved vibration damping properties and rheologically controlled characteristics is obtained by means of an extender oil which is a petroleum oil of high aromaticity to lower the cost of the product and improve the physical and functional properties of the potting material; the extender oil has a viscosity gravity constant greater than 0.95 and comprises greater than 55 percent by weight of the composition. Prior to polymerization the oil extended isocyanate prepolymer and polyol is blended with silica so that the composition as a whole exhibits a quite unexpected combination of properties which make the product especially adapted for potting electrical components.

Inventors

  • 👤 M Earing

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 11:07
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/005; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/30; C08G18/36; C08K; C08K3/00; C08K3/34; C08K3/36; C08K5/00; C08K5/01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/302; H01B3/307; H01F27/00; H01F27/02; H01F27/022; H01F27/33; C08G2350/00

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 28 words
The potting compound in accordance with claim 1 wherein the petroleum oil is characterized by a high degree of aromaticity and a boiling range of 70* - 1,000*F.
Claim 2
Dependent Claim 31 words
The electrical potting compound in accordance with claim 1 wherein the pouring characteristic will have viscosity of not less than 500 CPS at 70*C and greater than 50,000 CPS at 25*C.
Claim 3
Dependent Claim 9 words
A ballast containing the electrical potting compound of claim

References Cited (Backward Citations)

US3136732A Cited
US3390119A Cited
US3338861A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-07-16 1977-01-15 1977-07-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-07-16 1981-01-15 1981-07-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-07-16 1985-01-15 1985-07-17 $7700.00 Window Closed / Lapsed

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