US3423822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making large scale integrated circuit
Assignee: Nortel Networks Ltd
•
Filing: 1967-02-27
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Granted: 1969-01-28
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Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Ian A Davidson
- 👤 Gerald H Hantusch
- 👤 George A May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:37
CPC Classifications
H; H10; H10D; H10D89/00; H10D89/10; H10D84/00; H10D84/01; H10D84/0123; H10D84/0126; H10D84/0158; H10P; H10P74/00; H10P74/23; H10P74/232
Claims Analysis
Total Claims: 0
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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) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |