Patent US2628889A successfully refreshed from Google Patents.
US2628889A
Expired / Lapsed
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Preparation of hydroxylamine
Assignee: EIDP Inc
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Filing: 1949-08-27
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Granted: 1953-02-17
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Expires: 1969-08-27
Abstract
No abstract record available.
Inventors
- 👤 Benson Richard Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:26
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/14; C01B21/1409; C01B21/1418
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR THE CATALYTIC HYDROGENATION OF NITRIC OXIDE TO PRODUCE AN ACID SOLUTION OF HYDROXYLAMINE WHICH COMPRISES CATALYTICALLY HYDROGENATING NITRIC OXIDE WITH ELEMENTAL HYDROGEN IN A MEDIUM CONSISTING ESSENTIALLY OF WATER, A PLATINUM CATALYST AND A STRONG MINERAL ACID, SAID MEDIUM HAVING A PH OF LESS THAN 2,5 AND BEING MAINTAINED AT A TEMPERATURE BETWEEN THE FREEZING POINT OF THE REACTION MIXTURE AND 40* C., THE MOLAR RATIO OF THE NITRIC OXIDE TO THE ELEMENTAL HYDROGEN PRESENT BEING LESS THAN 1.
Claim 2
Dependent Claim
82 words
A PROCESS FOR THE CATALYTIC HYDROGENATION OF NITRIC OXIDE TO PRODUCE AN ACID SOLUTION OF HYDROXYLAMINE WHICH COMPRISES CATALYTICALLY HYDROGENATING NITRIC OXIDE WITH ELEMENTAL HYDROGEN IN A MEDIUM CONSISTING ESSENTIALLY OF WATER, A PLATINUM CATALYST AND A STRONG MINERAL ACID, SAID MEDIUM HAVING A PH OF LESS THAN 2,5 AND BEING MAINTAINED AT A TEMPERATURE BETWEEN THE FREEZING POINT OF THE REACTION MIXTURE AND 40* C., THE MOLAR RATIO OF THE NITRIC OXIDE TO THE ELEMENTAL HYDROGEN PRESENT BEING LESS THAN 1.
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) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |