US3402081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling the electrical characteristics of a semiconductor surface and product produced thereby
Assignee: International Business Machines Corp
•
Filing: 1965-06-30
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Granted: 1968-09-17
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Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 Herbert S Lehman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:54
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/14; H10P32/1408; H10P32/141; H10P32/17; H10P32/171; H10P95/00; Y; Y10; Y10S; Y10S438/00; Y10S438/91; Y10S438/914; Y10S438/918; Y10S438/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3226611A
Cited
US3287186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |