US3489658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a window in a passivating layer of a semiconductor
Assignee: JM Huber Corp
•
Filing: 1969-03-03
•
Granted: 1970-01-13
•
Expires: 1989-03-03
Abstract
No abstract record available.
Inventors
- 👤 David M Randall
- 👤 Robert C Henne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:28
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/40; H10W74/43; H10P; H10P50/00; H10P50/20; H10P50/28; H10P50/286; H10P50/287; H10W20/00; H10W20/40
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |