US3458831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor device for producing and amplifying electrical signals of very high frequencies
Assignee: US Philips Corp
•
Filing: 1967-06-06
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Granted: 1969-07-29
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Expires: 1987-06-06
Abstract
No abstract record available.
Inventors
- 👤 Robert Veilex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:53
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/54; H03B; H03B9/00; H03B9/12; H10; H10N; H10N80/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3365583A
Cited
US3314022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |