US2614052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of copper oxide rectifiers
Assignee: Westinghouse Air Brake Co
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Filing: 1949-03-16
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Granted: 1952-10-14
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Expires: 1969-03-16
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Taylor
- 👤 Linnie K Hedding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:10
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/07; H10D48/071; H10P; H10P14/00; H10P14/20; H10P14/203; H10P14/34; H10P14/3402; H10P14/3434
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
52 words
A METHOD OF MANUFACTURING COPPER OXIDE RECTIFIERS FROM COPPER BLANKS COMPRISING THE STEPS OF CLEANING THE BLANKS TO REMOVE SURFACE IMPURITIES; DIPPING THE BLANKS IN A WATER SOLUTION OF HYDRIODIC ACID HAVING A CONCENTRATION OF FROM 1.8 TO 3.6 PARTS HYDROGEN IODIDE PER MILLION; DRYING THE BLANKS; AND THEN OXIDIZING THE BLANKS.
References Cited (Backward Citations)
US1834275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-14 | 1956-04-14 | 1956-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-14 | 1960-04-14 | 1960-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-14 | 1964-04-14 | 1964-10-14 | $7700.00 | Window Closed / Lapsed |