US2827362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydroxylamine
Assignee: Spencer Chemical Co
•
Filing: 1953-07-28
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Granted: 1958-03-18
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Expires: 1973-07-28
Abstract
No abstract record available.
Inventors
- 👤 Willard C Bull
- 👤 Jr Harry C Zeisig
- 👤 Paul D Strickler
- 👤 Edwin G Marhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:05
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/14; C01B21/1409; C01B21/1418
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE PROCESS OF PRODUCING HYDROXYLAMINE WHICH COMPRISES: BRINGING TOGETHER A MEMBER OF THE GROUP CONSISTING OF (A) A SOLUTION ESSENTIALLY OF AQUEOUS NITRIC ACID AND (B) AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF NITRIC ACID AND AN ACID OF THE GROUP CONSISTING OF ACRTIC, FORMIC, AND MINERAL ACIDS EXCLUDING NITRIC ACID AND HYDROCHLORIC ACID; HYDROGEN; AND AN ACTIVE HYDROGENATION CATALYST; AT A TEMPERATURE OF 170* ING POINT OF THE REACTION MIXTURE OF A TEMPERATURE OF 170* C., AND PROVIDING SAID HYDROGEN AT A CATALYST-ACID INTERFACE AT LEAST PRIOR TO ANY APPRECIABLE DISSOLUTION OF THE CATALYST SO THAT DISSOLUTION OF THE CATALYST IS PREVENTED AND MAINTAINING HYDROGEN AT THE INTERFACE DURING REACTION: AND RECOVERING THE HYDROXYLAMINE SO PRODUCED.
Claim 2
Dependent Claim
116 words
THE PROCESS OF PRODUCING HYDROXYLAMINE WHICH COMPRISES: BRINGING TOGETHER A MEMBER OF THE GROUP CONSISTING OF (A) A SOLUTION ESSENTIALLY OF AQUEOUS NITRIC ACID AND (B) AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF NITRIC ACID AND AN ACID OF THE GROUP CONSISTING OF ACRTIC, FORMIC, AND MINERAL ACIDS EXCLUDING NITRIC ACID AND HYDROCHLORIC ACID; HYDROGEN; AND AN ACTIVE HYDROGENATION CATALYST; AT A TEMPERATURE OF 170* ING POINT OF THE REACTION MIXTURE OF A TEMPERATURE OF 170* C., AND PROVIDING SAID HYDROGEN AT A CATALYST-ACID INTERFACE AT LEAST PRIOR TO ANY APPRECIABLE DISSOLUTION OF THE CATALYST SO THAT DISSOLUTION OF THE CATALYST IS PREVENTED AND MAINTAINING HYDROGEN AT THE INTERFACE DURING REACTION: AND RECOVERING THE HYDROXYLAMINE SO PRODUCED.
References Cited (Backward Citations)
US2628889A
Cited
US2628888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |