US3767758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of salts of hydroxylamine
Assignee: Stamicarbon BV
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Filing: 1971-07-01
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Granted: 1973-10-23
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Expires: 1991-07-01
Abstract
Abstract SALTS OF HYDROXYLAMINE ARE PREPARED BY REDUCTION OF NITRIC ACID WITH HYDROGEN IN AN ACID MEDIUM AND A CATALYST CONTAINING A METAL FROM THE PLATINUM GROUP OF METALS AND AN ACTIVATOR SELECTED FROM THE GROUP OF METALS, INCLUDING COPPER, GERMANIUM, CADMIUM, INDIUM, TIN, GALLIUM, SILVER, ARSENIC, THALLIUM, ANTIMONY, GOLD MERCURY, LEAD AND BISMUTH. THE REACTION CATALYST EXHIBITS A HIGH SELECTIVITY AND CONVERSION.
Inventors
- 👤 P Mars
- 👤 C Duyverman
- 👤 M Gorgels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:29
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/14; C01B21/1409; C01B21/1418
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |