Patent US3420706A successfully refreshed from Google Patents.
US3420706A
Expired / Lapsed
US
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Technique for fabrication of printed circuit resistors
Assignee: AT&T Inc
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Filing: 1964-06-23
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Granted: 1969-01-07
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Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Charles C Y Kuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:14
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/26; H01C17/265; H01B; H01B1/00; Y; Y10; Y10S; Y10S428/00; Y10S428/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3056937A
Cited
US3167451A
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US3148129A
Cited
US3159556A
Cited
US3189482A
Cited
US3218194A
Cited
US3220889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |