US2784358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier and method of making it
Assignee: AT&T Inc
•
Filing: 1948-05-22
•
Granted: 1957-03-05
•
Expires: 1968-05-22
Abstract
No abstract record available.
Inventors
- 👤 Jack H Scaff
- 👤 Henry C Theuerer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:09
CPC Classifications
C; C22; C22B; C22B41/00; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
AN ASYMMETRICAL CONDUCTING DEVICE COMPRISING A BODY CONSISTING ESSENTIALLY OF GERMANIUM CONTAINING IN ITS ATOMIC LATTICE A TRACE, NOT MORE THAN .001 PERCENT, OF DONOR IMPURITY FROM THE GROUP CONSISTING OF ARSENIC AND ANTIMONY, AND A METALLIC POINT IN CONTACT WITH A LAPPED AND ELECTROLYTICALLY ETCHED SURFACE AND SAID BODY.
References Cited (Backward Citations)
US2402661A
Cited
US2402582A
Cited
US2378513A
Cited
US2530110A
Cited
US2462218A
Cited
US2583008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |