US2603692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier and method of making it
Assignee: AT&T Inc
•
Filing: 1948-05-22
•
Granted: 1952-07-15
•
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
2026-10-22 18:54
CPC Classifications
C; C22; C22B; C22B41/00; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US794459A
Cited
US1963419A
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US2042542A
Cited
US2419561A
Cited
US2438110A
Cited
US2438893A
Cited
US2437269A
Cited
US2469569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |