Patent US3159556A successfully refreshed from Google Patents.
US3159556A
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US
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Stabilized tantalum film resistors
Assignee: AT&T Inc
•
Filing: 1960-12-08
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Granted: 1964-12-01
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Expires: 1980-12-08
Abstract
No abstract record available.
Inventors
- 👤 David A Mclean
- 👤 Warren J Pendergast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:24
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/18; H01; H01B; H01B1/00; H01C; H01C17/00; H01C17/22; H01C17/26; H01C17/262; H10; H10N; H10N97/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2174840A
Cited
GB444892A
Cited
US2169594A
Cited
GB601636A
Cited
US2743400A
Cited
US2885524A
Cited
FR1189974A
Cited
US2950996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |