Patent US2992337A successfully refreshed from Google Patents.
US2992337A
Expired / Lapsed
US
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Multiple collector transistors and circuits therefor
Assignee: International Business Machines Corp
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Filing: 1955-05-20
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Granted: 1961-07-11
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Expires: 1975-05-20
Abstract
No abstract record available.
Inventors
- 👤 Richard F Rutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:06
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1203; H03B5/1231; H03F; H03F99/00; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/29; H03K3/35; H10; H10D; H10D10/00; H10D48/00; H10D48/30; H10D48/32; H10D48/34; H10D48/345; H10D62/00; H10D62/10; H10D88/00; H10D99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |