US3787965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making resistor
Assignee: Spacetac Inc
•
Filing: 1971-07-21
•
Granted: 1974-01-29
•
Expires: 1991-07-21
Abstract
Abstract A method of manufacturing a precision resistor element of a predetermined resistance value, the resistor element including a quantity of resistive material extending between two terminals comprising removing a first portion of the resistive material in a first area between the terminals for substantially increasing the resistance to obtain a first resistance value for the resistor element, and removing a second portion of the resistive material in a second area alongside of the first area and between the first area and one of the terminals for slightly increasing the resistance to obtain the predetermined resistance value.
Inventors
- 👤 T Cocca
- 👤 P Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:30
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A method of manufacturing a precision resistor element of a predetermined resistance value comprising: applying resisTor material between two terminals on a substrate; baking and drying the resistor material; applying a glass coating on the resistor material; baking and drying the glass coating; co-firing the material and coating a first temperature to form a resistor element; removing a first portion of said resistor material between said terminals in a path transverse to the extent of said resistor material between said terminals for increasing the resistance of said element to at least a first resistance value less than said predetermined resistance value and removing a second portion of said resistor material in a second path shorter than and adjacent to said first path, between said first path and one of said terminals for increasing the resistance to said predetermined resistance value; and applying a low temperature glass coating to cover said resistor material exposed by the removal of said portions, baking and drying the low temperature glass coating at approximately 125* C., and firing the resistor element and low temperature glass coating at a temperature of approximately 525* C. which is lower than said first temperature.
Claim 2
Independent Claim
195 words
A method of manufacturing a precision resistor element of a predetermined resistance value comprising: applying resisTor material between two terminals on a substrate; baking and drying the resistor material; applying a glass coating on the resistor material; baking and drying the glass coating; co-firing the material and coating a first temperature to form a resistor element; removing a first portion of said resistor material between said terminals in a path transverse to the extent of said resistor material between said terminals for increasing the resistance of said element to at least a first resistance value less than said predetermined resistance value and removing a second portion of said resistor material in a second path shorter than and adjacent to said first path, between said first path and one of said terminals for increasing the resistance to said predetermined resistance value; and applying a low temperature glass coating to cover said resistor material exposed by the removal of said portions, baking and drying the low temperature glass coating at approximately 125* C., and firing the resistor element and low temperature glass coating at a temperature of approximately 525* C. which is lower than said first temperature.
References Cited (Backward Citations)
US2597674A
Cited
US3284878A
Cited
US3411947A
Cited
US3394386A
Cited
US3456170A
Cited
US3509511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |