US2740076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal triodes
Assignee: International Standard Electric Corp
•
Filing: 1952-04-04
•
Granted: 1956-03-27
•
Expires: 1972-04-04
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 01:26
CPC Classifications
H; H10; H10P; H10P95/00; G; G01; G01R; G01R31/00; G01R31/26; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A CRYSTAL TRIODE COMPRISING A MAIN BODY OF SEMICONDUCTING MATERIAL AND HAVING ON ONE OF ITS SURFACES A FIRST LAYER OF OPPOSITE CONDUCTIVELY TO THE MAIN BODY, A SECOND LAYER ON SAID FIRST LAYER AND OF OPPOSITE CONDUCTIVITY TO SAID FIRST LAYER, A BASE ELECTRODE IN CONTACT WITH SAID MAIN BODY, AND TWO ADDITIONAL ELECTRODES MAKING RECTIFYING CONTACT RESPECTIVELY WITH SAID FIRST AND SECOND LAYERS.
Claim 2
Dependent Claim
65 words
A CRYSTAL TRIODE COMPRISING A MAIN BODY OF SEMICONDUCTING MATERIAL AND HAVING ON ONE OF ITS SURFACES A FIRST LAYER OF OPPOSITE CONDUCTIVELY TO THE MAIN BODY, A SECOND LAYER ON SAID FIRST LAYER AND OF OPPOSITE CONDUCTIVITY TO SAID FIRST LAYER, A BASE ELECTRODE IN CONTACT WITH SAID MAIN BODY, AND TWO ADDITIONAL ELECTRODES MAKING RECTIFYING CONTACT RESPECTIVELY WITH SAID FIRST AND SECOND LAYERS.
References Cited (Backward Citations)
US2524035A
Cited
US2653374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |