Patent US3833717A successfully refreshed from Google Patents.
US3833717A
Expired / Lapsed
US
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Production of cuprous oxide
Assignee: United States Department of the Interior
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Filing: 1972-08-01
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Granted: 1974-09-03
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Expires: 1992-08-01
Abstract
Abstract CUPRIC AMMINE COMPLEX IS REDUCED BY CUPROUS AMMINE COMPLEX IN AQUEOUS SOLUTION BY MEANS OF CONVENTIONAL REDUCING AGENTS SUCH AS H2 OR CO. THE CUPROUS COMPLEX IS THEN TREATED WITTH A BASE, SUCH AS NAOH, TO PRECIPITATE CUPROUS OXIDE.
Inventors
- 👤 R Lindstrom
- 👤 C Elges
- 👤 P Haskett
- 👤 D Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:34
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/02; C01P; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |