Patent US2991373A successfully refreshed from Google Patents.
US2991373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device comprising an asymmetrical transistor trigger circuit and two input networks
Assignee: US Philips Corp
•
Filing: 1956-01-31
•
Granted: 1961-07-04
•
Expires: 1976-01-31
Abstract
No abstract record available.
Inventors
- 👤 Morgan Leonard Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:22
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2569345A
Cited
US2628310A
Cited
US2673936A
Cited
US2663806A
Cited
US2644897A
Cited
US2761965A
Cited
US2854589A
Cited
US2724061A
Cited
US2843761A
Cited
US2861200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |