US3220938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxide underlay for printed circuit components
Assignee: AT&T Inc
•
Filing: 1961-03-09
•
Granted: 1965-11-30
•
Expires: 1981-03-09
Abstract
No abstract record available.
Inventors
- 👤 David A Mclean
- 👤 Doris S Nicodemus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:35
CPC Classifications
H; H01; H01G; H01G2/00; H01C; H01C17/00; H01G9/00; H01G9/004; H01G9/04; H01G9/042; H10; H10N; H10N97/00; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2148046A
Cited
US2472304A
Cited
US2607825A
Cited
US2628927A
Cited
US2719797A
Cited
US2812297A
Cited
US2886502A
Cited
US2958117A
Cited
GB845453A
Cited
US3035990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |