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US3784407A
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Baked resistance member and the process of manufacture thereof
Assignee: Ceramic Kagaku YK
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Filing: 1971-05-25
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Granted: 1974-01-08
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Expires: 1991-05-25
Abstract
Abstract A resistance member is produced by forming a paste of zinc metal powder and synthetic resin paint, applying the paste as a film on a base and heating the base to remove the paint component and leave a baked film of zinc on the base. The zinc film is substantially non-oxidized and has a determinate resistance value. Glass powder and other metal powders may be mixed with the zinc to control the final resistance value, but the zinc must be initially present in an amount of at least 20 percent by weight.
Inventors
- 👤 H Shiio
- 👤 M Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:19
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06526; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
13 words
A process according to claim 1, wherein said inorganic powder comprises glass powder.
Claim 2
Dependent Claim
21 words
A process according to claim 1, wherein the inorganic powder comprises glass powder and metal powder of copper, tin or lead.
Claim 3
Dependent Claim
20 words
A process according to claim 1, wherein said synthetic resin paint comprises a squeegee oil used for silk screen printing.
Claim 4
Dependent Claim
24 words
A process according to claim 1, wherein said synthetic resin paint comprises a cellulose resin, a vinyl resin or mixture thereof and a vehicle.
Claim 5
Dependent Claim
19 words
A process according to claim 1, wherein said synthetic resin paint comprises 30 percent polymethacrylic ester in benzyl alcohol.
Claim 6
Dependent Claim
19 words
A process according to claim 1, wherein said synthetic resin paint comprises 40 percent polymethacrylic ester in trImethyl benzene.
Claim 7
Dependent Claim
23 words
A process according to claim 1, wherein the heating of the film is at a temperature of 650* - 750*C. for 10-15 minutes.
Claim 8
Dependent Claim
22 words
A process according to claim 1, wherein said paste is prepared by blending zinc metal powder alone with the synthetic resin paint.
Claim 9
Dependent Claim
44 words
A process according to claim 1, wherein said paste is prepared by mixing zinc metal powder of at least 20 parts by weight with the inorganic powder as the remainder, and the resultant mixture is blended with one-half volume of the synthetic resin paint.
Claim 10
Dependent Claim
26 words
A process according to claim 6, wherein the mixture comprises zinc metal powder of at least 20 parts by weight and glass powder as the remainder.
Claim 11
Dependent Claim
33 words
A process according to claim 6, wherein the mixture comprises zinc metal powder of at least 20 parts by weight, glass powder of 10 parts by weight and metal powder as the remainder.
Claim 12
Dependent Claim
33 words
A resistance member consisting essentially of a a baked resistance film on a base, said film having determinate resistance values and consisting of inorganic materials including at least 20 percent zinc by weight.
Claim 13
Dependent Claim
24 words
A baked resistance member according to claim 13 wherein the zinc in the film contains less than 10 percent of oxidized zinc by weight.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |