US2691577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloys and rectifiers made thereof
Assignee: Purdue Research Foundation
•
Filing: 1949-12-31
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Granted: 1954-10-12
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Expires: 1969-12-31
Abstract
No abstract record available.
Inventors
- 👤 Lark-Horovitz Karl
- 👤 Randall M Whaley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:36
CPC Classifications
C; C22; C22B; C22B41/00; C22B11/00; C22B11/10; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
AN ALLOY HAVING SEMI-CONDUCTING PROPERTIES AND CONSISTING ESSENTIALLY OF GERMANIUM AND TITANIUM IN AN AMOUNT UP TO 0.5 ATOMIC PERCENT.
Claim 2
Dependent Claim
20 words
AN ALLOY HAVING SEMI-CONDUCTING PROPERTIES AND CONSISTING ESSENTIALLY OF GERMANIUM AND TITANIUM IN AN AMOUNT UP TO 0.5 ATOMIC PERCENT.
References Cited (Backward Citations)
US2530110A
Cited
US2472770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |