Patent US3438873A successfully refreshed from Google Patents.
US3438873A
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Anodic treatment to alter solubility of dielectric films
Assignee: AT&T Inc
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Filing: 1966-05-11
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Granted: 1969-04-15
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Expires: 1986-05-11
Abstract
No abstract record available.
Inventors
- 👤 Paul F Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:17
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/66; H10P14/662; H10P76/00; H10P76/40; H10W; H10W74/00; H10W74/40; H10P14/63; H10P14/6302; H10P14/6324; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/114; Y10S438/00; Y10S438/942
Claims Analysis
Total Claims: 0
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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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |