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US2583585A
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Production of hydrazine hydrate
Assignee: MW Kellogg Co
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Filing: 1946-08-06
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Granted: 1952-01-29
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Expires: 1966-08-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Walton H Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:27
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD FOR PRODUCING HYDRAZINE HYDRATE WHICH COMPRISES: CONTACTING AMMONIA WITH AN EFFECTIVE QUANTITY OF A CONTACT AGENT COMPRISING A REDUCIBLE METAL OXIDE IN A MOL RATIO OF AMMONIA TO NET AVAILABLE OXYGEN OF AT LEAST 5:1 IN A REACTION ZONE AT AN ELEVATED TEMPERATURE AND AT SUPER-ATMOSPHERIC PRESSURE TO OXIDIZE THE AMMONIA TO HYDRAZINE HYDRATE AND REDUCE SAID METAL OXIDE, SAID REDUCIBLE METAL OXIDE BEING THE MAJOR SOURCE OF OXYGEN FOR THE HYDROAZINE-PRODUCING REACTION AND THE CONTACT TIME AT THE OPERATING CONDITIONS SELECTED BEING LIMITED TO RESTRICT THE CONVERSION OF AMMONIA PER PASS TO LESS
Claim 2
Independent Claim
96 words
A METHOD FOR PRODUCING HYDRAZINE HYDRATE WHICH COMPRISES: CONTACTING AMMONIA WITH AN EFFECTIVE QUANTITY OF A CONTACT AGENT COMPRISING A REDUCIBLE METAL OXIDE IN A MOL RATIO OF AMMONIA TO NET AVAILABLE OXYGEN OF AT LEAST 5:1 IN A REACTION ZONE AT AN ELEVATED TEMPERATURE AND AT SUPER-ATMOSPHERIC PRESSURE TO OXIDIZE THE AMMONIA TO HYDRAZINE HYDRATE AND REDUCE SAID METAL OXIDE, SAID REDUCIBLE METAL OXIDE BEING THE MAJOR SOURCE OF OXYGEN FOR THE HYDROAZINE-PRODUCING REACTION AND THE CONTACT TIME AT THE OPERATING CONDITIONS SELECTED BEING LIMITED TO RESTRICT THE CONVERSION OF AMMONIA PER PASS TO LESS
References Cited (Backward Citations)
US858904A
Cited
US1237884A
Cited
US1558598A
Cited
US1332291A
Cited
US1899184A
Cited
US2421664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |