Patent EP0139872A1 successfully refreshed from Google Patents.
US2653374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric semiconductor
Assignee: International Standard Electric Corp
•
Filing: 1950-03-18
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Granted: 1953-09-29
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Expires: 1970-03-18
Abstract
No abstract record available.
Inventors
- 👤 Matthews Kenneth Albert
- 👤 White Charles De Boismaison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:07
CPC Classifications
H; H10; H10P; H10P10/00; H03; H03K; H03K3/00; H03K3/02; H03K3/313
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2446467A
Cited
US2577803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |