US3544858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated gate field-effect transistor comprising a mesa channel and a thicker surrounding oxide
Assignee: US Philips Corp
•
Filing: 1968-05-08
•
Granted: 1970-12-01
•
Expires: 1988-05-08
Abstract
No abstract record available.
Inventors
- 👤 Else Kooi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:37
CPC Classifications
H; H10; H10D; H10D30/00; H10D30/60; H10D64/00; H10D64/20; H10D64/23; H10D64/251; H10D64/256; H10P; H10P14/00; H10P14/60; H10P14/61; H10W; H10W10/00; H10W10/01; H10W10/011; H10W10/012; H10W10/0125; H10W10/0128; H10W10/10; H10W10/13; H10W20/00; H10W20/01; H10W20/031; H10W20/069; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/053; Y10S148/103; Y10S148/113; Y10S148/114; Y10S148/117; Y10S148/141
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3233186A
Cited
US3344322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |