Patent US5321553A successfully refreshed from Google Patents.
Patent US3355532A successfully refreshed from Google Patents.
US3355532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded resistor and method of fabricating same
Assignee: Ltv Electrosystems Inc
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Filing: 1963-01-15
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Granted: 1967-11-28
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Expires: 1983-01-15
Abstract
No abstract record available.
Inventors
- 👤 Lloyd J Bracht
- 👤 Kenneth L Devall
- 👤 Herbert J Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:17
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/002; H01B3/18; H01B3/30; H01B3/46; H01C; H01C1/00; H01C1/02; H01C1/034; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A METHOD OF MANUFACTURING POWER RESISTORS OF THE TYPE WHEREIN A RESISTANCE ELEMENT IS ENCASED IN A PROTECTIVE MATERIAL COMPRISING: FIRST FORMING A DRY MIX BY BLENDING THE FOLLOWING INGREDIENTS SUBSTANTIALY IN THE LISTED PROPORTIONS BY WEIGHT OF THE FINAL WET MIX: INORGANIC FIBROUS MATERIAL 65%, FINELY DIVIDED ALUMINUM SILICATE PIGMENT 12%, GROUND MICA 6%, GLAZE STAIN 1.5%; SECOND ADDING TO THE DRY MIX SILICONE RESIN IN SOLVENT TO PROVIDE A FINAL WET MIX WITH THE LIQUID RESIN SOLUTION PROVIDING SUBSTANTIALLY 16% OF THE TOTAL WET MIX WEIGHT; THIRD HEATING TUMBLING AND SIFTING THE FINAL WET MIX TO EVAPORATE SAID SOLVENT FROM THE FINAL MIX AND TO PROVIDE A CONTROLLED GRANULATION THEREOF; FOURTH COMPRESSING THE GRANULATED MIX BOUT THE RESISTANCE ELEMENT AT A PRESSURE RANGING FROM ONE-QUARTER TO TEN TONS PER SQUARE INCH; AND FINALLY SUBJECTING THE MOLDED RESISTOR TO A TIME-TEMPERATURE CYCLE OF APPROXIMATELY 200* F. FOR ONE-HALF HOUR, 350* F. FOR ONE HOUR AND 500* F. FOR TWO HOURS.,
Claim 2
Independent Claim
161 words
A METHOD OF MANUFACTURING POWER RESISTORS OF THE TYPE WHEREIN A RESISTANCE ELEMENT IS ENCASED IN A PROTECTIVE MATERIAL COMPRISING: FIRST FORMING A DRY MIX BY BLENDING THE FOLLOWING INGREDIENTS SUBSTANTIALY IN THE LISTED PROPORTIONS BY WEIGHT OF THE FINAL WET MIX: INORGANIC FIBROUS MATERIAL 65%, FINELY DIVIDED ALUMINUM SILICATE PIGMENT 12%, GROUND MICA 6%, GLAZE STAIN 1.5%; SECOND ADDING TO THE DRY MIX SILICONE RESIN IN SOLVENT TO PROVIDE A FINAL WET MIX WITH THE LIQUID RESIN SOLUTION PROVIDING SUBSTANTIALLY 16% OF THE TOTAL WET MIX WEIGHT; THIRD HEATING TUMBLING AND SIFTING THE FINAL WET MIX TO EVAPORATE SAID SOLVENT FROM THE FINAL MIX AND TO PROVIDE A CONTROLLED GRANULATION THEREOF; FOURTH COMPRESSING THE GRANULATED MIX BOUT THE RESISTANCE ELEMENT AT A PRESSURE RANGING FROM ONE-QUARTER TO TEN TONS PER SQUARE INCH; AND FINALLY SUBJECTING THE MOLDED RESISTOR TO A TIME-TEMPERATURE CYCLE OF APPROXIMATELY 200* F. FOR ONE-HALF HOUR, 350* F. FOR ONE HOUR AND 500* F. FOR TWO HOURS.,
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |