Patent US3538398A successfully refreshed from Google Patents.
US3538398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor element with improved guard region
Assignee: Siemens Mobility Ltd
•
Filing: 1967-12-04
•
Granted: 1970-11-03
•
Expires: 1987-12-04
Abstract
No abstract record available.
Inventors
- 👤 Gerald Whiting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:10
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D62/124; H10D62/126; H10D62/102; H10D62/103; H10D62/105; H10D62/106
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3335296A
Cited
US3226611A
Cited
US3226613A
Cited
US3226612A
Cited
US3226614A
Cited
US3309245A
Cited
US3271640A
Cited
US3338758A
Cited
US3394037A
Cited
US3391287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |