US3252831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistor and method of producing the same
Assignee: Electra Manufacturing Co
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Filing: 1964-05-06
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Granted: 1966-05-24
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Expires: 1984-05-06
Abstract
No abstract record available.
Inventors
- 👤 Randall C Ragan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
H; H01; H01C; H01C7/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A METHOD OF PRODUCING A FILM-TYPE ELECTRICAL RESISTOR COMPRISING THE STEPS OF PROVIDING AN ELECTRICALLY INSULATING SUBSTRATE WHICH IS RESISTANT TO HIGH TEMPERATURES, DEPOSITING A MIXTURE OF FINELY DIVIDED GLASS AND THERMALLY DECOMPOSABLE ORGANIC COMPOUNDS OF THE METALS SILVER, PLATINUM, AND GOLD AS A THIN COATING ON THE SURFACE OF SAID SUBSTRATE, SAID GLASS HAVING A FUSING POINT BELWO THE MELTING POINTS OF SAID METALS, INCREASING THE TEMPERATURE OF SAID COATING AT A RELATIVELY SLOW RATE UNTIL THE ELECTRICAL RESISTANCE OF THE METAL-GLASS SYSTEM IS REDUCED TO SUBSTANTIALLY ITS MINIMUM VALUE, INCREASING THE TEMPERATURE OF SAID COATING AT LEAST TO THE FUSING POINT OF SAID GLASS, BUT BELOW THE MELTING POINT OF SAID METALS, AT A RELATIVELY RAPID RATE SUFFICIENT TO AVOID ANY SUBSTANTIALLY INCREASE IN THE ELECTRICAL RESISTANCE OF THE METAL-GLASS SYSTEM, MAINTAINING THE COATING AT THE FUSING TEMPERATURE FOR A PERIOD SUFFICIENT TO COMPLETELY FUSE THE GLASS WITHOUT SUBSTANTIALLY INCREASING THE ELECTRICAL RESISTANCE OF THE METAL-GLASS SYSTEM, AND COOLING THE RESULTING GLASSY COATING TO SOLIDIFY THE GLASS AND FORM A CONTINUOUS IMPERVIOUS METAL-GLASS FILM BONDED TO THE SURFACE OF THE SUBSTRATE.
Claim 2
Independent Claim
183 words
A METHOD OF PRODUCING A FILM-TYPE ELECTRICAL RESISTOR COMPRISING THE STEPS OF PROVIDING AN ELECTRICALLY INSULATING SUBSTRATE WHICH IS RESISTANT TO HIGH TEMPERATURES, DEPOSITING A MIXTURE OF FINELY DIVIDED GLASS AND THERMALLY DECOMPOSABLE ORGANIC COMPOUNDS OF THE METALS SILVER, PLATINUM, AND GOLD AS A THIN COATING ON THE SURFACE OF SAID SUBSTRATE, SAID GLASS HAVING A FUSING POINT BELWO THE MELTING POINTS OF SAID METALS, INCREASING THE TEMPERATURE OF SAID COATING AT A RELATIVELY SLOW RATE UNTIL THE ELECTRICAL RESISTANCE OF THE METAL-GLASS SYSTEM IS REDUCED TO SUBSTANTIALLY ITS MINIMUM VALUE, INCREASING THE TEMPERATURE OF SAID COATING AT LEAST TO THE FUSING POINT OF SAID GLASS, BUT BELOW THE MELTING POINT OF SAID METALS, AT A RELATIVELY RAPID RATE SUFFICIENT TO AVOID ANY SUBSTANTIALLY INCREASE IN THE ELECTRICAL RESISTANCE OF THE METAL-GLASS SYSTEM, MAINTAINING THE COATING AT THE FUSING TEMPERATURE FOR A PERIOD SUFFICIENT TO COMPLETELY FUSE THE GLASS WITHOUT SUBSTANTIALLY INCREASING THE ELECTRICAL RESISTANCE OF THE METAL-GLASS SYSTEM, AND COOLING THE RESULTING GLASSY COATING TO SOLIDIFY THE GLASS AND FORM A CONTINUOUS IMPERVIOUS METAL-GLASS FILM BONDED TO THE SURFACE OF THE SUBSTRATE.
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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |