US2867732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current multiplication transistors and method of producing same
Assignee: International Business Machines Corp
•
Filing: 1953-05-14
•
Granted: 1959-01-06
•
Expires: 1973-05-14
Abstract
No abstract record available.
Inventors
- 👤 Richard F Rutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:58
CPC Classifications
H; H10; H10D; H10D99/00; H10F; H10F99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A TRANSISTOR COMPRISING A SEMICONDUCTOR BODY AND COLLECTOR AND BASE ELECTRODES AND FIRST AND SECOND CONTROL ELEMENTS THEREFOR, EACH SAID CONTROL ELEMENT COMPRISING A SOURCE OF LIGHT RAYS DISPOSED TO CAUSE SAID RAYS TO IMPINGE UPON ONE SURFACE OF SAID SEMICONDUCTOR BODY.
Claim 2
Dependent Claim
42 words
A TRANSISTOR COMPRISING A SEMICONDUCTOR BODY AND COLLECTOR AND BASE ELECTRODES AND FIRST AND SECOND CONTROL ELEMENTS THEREFOR, EACH SAID CONTROL ELEMENT COMPRISING A SOURCE OF LIGHT RAYS DISPOSED TO CAUSE SAID RAYS TO IMPINGE UPON ONE SURFACE OF SAID SEMICONDUCTOR BODY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |