US2874232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor element and transistor circuit
Assignee: US Philips Corp
•
Filing: 1954-02-01
•
Granted: 1959-02-17
•
Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Jochems Pieter Johan Wilhelmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:31
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/343; H03F3/3432; H03F3/3435; H03F3/3437; H03F3/04; H03F3/14; H10; H10D; H10D88/00; H10P; H10P95/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2569347A
Cited
US2623102A
Cited
US2600500A
Cited
US2666814A
Cited
US2586080A
Cited
US2663806A
Cited
US2655610A
Cited
US2655609A
Cited
US2663830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |