US2498238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance compositions and products thereof
Assignee: Westinghouse Electric Corp
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Filing: 1947-04-30
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Granted: 1950-02-21
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Expires: 1967-04-30
Abstract
No abstract record available.
Inventors
- 👤 Leo J Berberich
- 👤 Wesley W Pendleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:36
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; H01B3/00; H01B3/18; H01B3/30; H01B3/42; Y; Y10; Y10S; Y10S174/00; Y10S174/13; Y10S174/14; Y10S174/24; Y10S174/29
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A RESISTANCE COMPOSITION COMPOSED OF 100 PARTS BY WEIGHT OF AN OIL MODIFIED ALKYD RESIN DERIVED BY REACTING FROM 45% TO 60% BY WEIGHT OF A DRYING OIL COMPOUND SELECTED FROM THE GROUP CONSISTING OF LINSEED OIL AND LINSEED OIL ACIDS, FROM 40% TO 30%, RESPECTIVELY OF PHTHALIC ANHYDRIDE, AND THE BALANCE GLYCEROL, FROM 8 TO 25 PARTS BY WEIGHT OF ACETYLENE BLACK AND AT LEAST 150 PARTS BY WEIGHT OF A VOLATILE ORGANIC SOLVENT, THE COMPOSITION HAVING BEEN MILLED UNTIL THE VISCOSITY AND RESISTIVITY ATTAIN RELATIVELY CONSTANT VALUES, AND CURED FILMS OF THE COMPOSITION HAVING A RESISTIVITY OF FROM 3000 TO 6000 OHMS PER SQUARE OF SURFACE AREA.
Claim 2
Dependent Claim
109 words
A RESISTANCE COMPOSITION COMPOSED OF 100 PARTS BY WEIGHT OF AN OIL MODIFIED ALKYD RESIN DERIVED BY REACTING FROM 45% TO 60% BY WEIGHT OF A DRYING OIL COMPOUND SELECTED FROM THE GROUP CONSISTING OF LINSEED OIL AND LINSEED OIL ACIDS, FROM 40% TO 30%, RESPECTIVELY OF PHTHALIC ANHYDRIDE, AND THE BALANCE GLYCEROL, FROM 8 TO 25 PARTS BY WEIGHT OF ACETYLENE BLACK AND AT LEAST 150 PARTS BY WEIGHT OF A VOLATILE ORGANIC SOLVENT, THE COMPOSITION HAVING BEEN MILLED UNTIL THE VISCOSITY AND RESISTIVITY ATTAIN RELATIVELY CONSTANT VALUES, AND CURED FILMS OF THE COMPOSITION HAVING A RESISTIVITY OF FROM 3000 TO 6000 OHMS PER SQUARE OF SURFACE AREA.
Claim 3
Dependent Claim
125 words
AN ELECTRICAL WINDING COMPRISING, IN COMBINATION, AN ELECTRICAL CONDUCTOR HAVING A SLOT PORTION, ELECTRICAL INSULATION APPLIED TO THE ELECTRICAL CONDUCTOR AT THE SLOT PORTION, THE INSULATION INCLUDING AN EXTERIOR FIBROUS COVERING, AND A CURED RESISTANCE COMPOSITION APPLIED TO THE SLOT PORTION OF THE EXTERIOR FIBROUS COVERING, THE CURED RESISTANCE COMPOSITION COMPOSED OF A DRYING OIL MODIFIED GLYCEROL-PHTHALATE RESIN CONTAINING 45% TO 60% BY WEIGHT OF THE DRYING OIL, FROM 40% TO 30% BY WEIGHT OF PHTHALIC ANHYDRIDE AND FROM 10% TO 15% OF GLYCEROL, AND FROM 1/4 TO 1/12 OF ITS WEIGHT OF COLLOIDAL ACETYLENE BLACK, THE WHOLE HAVING BEEN MILLED TO A RELATIVELY CONSTANT VOLUME RESISTIVITY, THE FIBROUS COVERING SO TREATED HAVING A RESITIVITY OF 400 TO 2500 OHMS PER SQUARE OF SURFACE AREA.
Claim 4
Dependent Claim
125 words
AN ELECTRICAL WINDING COMPRISING, IN COMBINATION, AN ELECTRICAL CONDUCTOR HAVING A SLOT PORTION, ELECTRICAL INSULATION APPLIED TO THE ELECTRICAL CONDUCTOR AT THE SLOT PORTION, THE INSULATION INCLUDING AN EXTERIOR FIBROUS COVERING, AND A CURED RESISTANCE COMPOSITION APPLIED TO THE SLOT PORTION OF THE EXTERIOR FIBROUS COVERING, THE CURED RESISTANCE COMPOSITION COMPOSED OF A DRYING OIL MODIFIED GLYCEROL-PHTHALATE RESIN CONTAINING 45% TO 60% BY WEIGHT OF THE DRYING OIL, FROM 40% TO 30% BY WEIGHT OF PHTHALIC ANHYDRIDE AND FROM 10% TO 15% OF GLYCEROL, AND FROM 1/4 TO 1/12 OF ITS WEIGHT OF COLLOIDAL ACETYLENE BLACK, THE WHOLE HAVING BEEN MILLED TO A RELATIVELY CONSTANT VOLUME RESISTIVITY, THE FIBROUS COVERING SO TREATED HAVING A RESITIVITY OF 400 TO 2500 OHMS PER SQUARE OF SURFACE AREA.
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) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |