US3440715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating integrated circuits by controlled process
Assignee: AT&T Inc
•
Filing: 1967-08-22
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Granted: 1969-04-29
•
Expires: 1987-08-22
Abstract
No abstract record available.
Inventors
- 👤 Edward J Seng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:19
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/60; H10D84/611; H10D84/613; H10D84/01; H10D84/0112; H10D84/02; H10D84/03; H10D84/038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3304594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |