US2829281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor switching circuit
Assignee: US Philips Corp
•
Filing: 1955-09-08
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Granted: 1958-04-01
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Expires: 1975-09-08
Abstract
No abstract record available.
Inventors
- 👤 Adrianus Johannes Wilhel Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:46
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/68; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/24; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US298416A
Cited
US2718591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |