Patent US3666552A successfully refreshed from Google Patents.
US3666552A
Expired / Lapsed
US
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Method for giving electric conductivity to non-conductor
Assignee: Shikoku Paper Manufacturing Co
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Filing: 1970-11-16
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Granted: 1972-05-30
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Expires: 1990-11-16
Abstract
Abstract A METHOD FOR IMPARTING ELECTRIC CONDUCTIVITY TO A NONCONDUCTOR COMPRISES DEPOSITING COPPER ON ITS SURFACE BY HEATING NON-CONDUCTOR AT A TEMPERATURE NOT EXCEEDING 100*C. IN AN AQUEOUS SOLUTION OF A COMPLEX OF CORPOUS THIOCYANATE AND THIOUREA. IN THE CASE OF AN ABSORBENT NONCONDUCTOR, THE LATTER CAN BE TREATED WITH AN AQUEOUS OR ORGANIC SOLUTION OF THE COMPLEX AT ROOM TEMPERATURE, THE NON-CONDUCTOR IS MADE ALKALINE AT A TEMPERATURE NOT EXCEEDING 100*C. BY EXPOSING IT TO AMMONIA GAS, WHEREUPON COPPER IS DEPOSITED WITHIN AND ON THE SURFACE OF THE NON-CONDUCTOR.
Inventors
- 👤 Buichiro Ayukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:39
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/12; Y; Y10; Y10S; Y10S428/00; Y10S428/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |