US3380852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming an oxide coating on semiconductor bodies
Assignee: AT&T Inc
•
Filing: 1964-11-23
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Granted: 1968-04-30
•
Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 Goetzberger Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:24
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6322; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/6309; Y; Y10; Y10S; Y10S148/00; Y10S148/118; Y10S438/00; Y10S438/974
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3100723A
Cited
US3293085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |