US3808045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of electric contacts
Assignee: Individual
•
Filing: 1971-06-10
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Granted: 1974-04-30
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Expires: 1991-06-10
Abstract
Abstract A method for manufacturing electric contacts for carbon varnish filament microresistors consisting of coating the carbon varnish coating on the microresistor with a layer of a current-conducting paste containing a binder and having flux properties, thereafter, said paste is fired at a temperature which does not cause destruction of the organic compound of the carbon varnish coating, then a flux is applied onto the layer of said paste and the fluxed portions are tinned. The paste comprises a compound including an organic binder based on glyptal resins and finely-dispersed silver having a weight ratio of 1:24.
Inventors
- 👤 T Avdeeva
- 👤 N Shapiro
- 👤 E Baikova
- 👤 A Knyazhev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:57
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/28; H01C17/281; H01C17/283; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49098; Y10T29/49101; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2949
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A method of manufacture of electric contacts of carbon varnish coated filament microresistors as claimed in claim 1, in which said paste is applied as bands around a continuously moving filament having a carbon varnish coating, followed by tinning said bands and cutting the filament into portions in the middle of said bands.
Claim 2
Dependent Claim
47 words
A method of manufacture of electric contacts of carbon varnish coated filament microresistors as claimed in claim 1, in which the paste applied onto the carbon varnish coating contains an organic binder based on glyptal resins and finely-dispersed silver in a weight ratio of 1 : 24.
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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |