US2948815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement comprising a phototransistor
Assignee: US Philips Corp
•
Filing: 1956-01-23
•
Granted: 1960-08-09
•
Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Willems Ebertus
- 👤 Netten Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:18
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/08; H03F1/00; H03F1/34; H10; H10F; H10F99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2701309A
Cited
US2544211A
Cited
US2579336A
Cited
US2811590A
Cited
US2862109A
Cited
US2854614A
Cited
US2820855A
Cited
US2816283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |