US2698286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydration of hydrazine solutions
Assignee: Battelle Development Corp
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Filing: 1949-05-31
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Granted: 1954-12-28
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Expires: 1969-05-31
Abstract
No abstract record available.
Inventors
- 👤 Jr John R Bircher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:32
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/16; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
THE METHOD OF DEHYDRATING HYDRAZINE WHICH COMPRISES DISTILLING AN AQUEOUS HYDRAZINE MIXTURE COMPRISING BY WEIGHT ABOUT 70 PER CENT HYDRAZINE AND ABOUT 30 PER CENT WATER IN THE PRESENCE OF AN ORGANIC ENTRAINER SELECTED FROM THE GROUP CONSISTING OF ANILINE, PYRIDINE, BENZENE, PHENOL, XYLIDINE, XYLENE, TOLUENE, N-HEXYL ALCOHOL, AND N-HEXYLAMINE, TO REMOVE AN AZEOTROPE WITH WATER AND TO PRODUCE A SOLUTION HAVING A SUBSTANTIALLY DIFFERENT RATIO OF WATER AND HYDRAZINE THAN THE ORIGINAL MIXTURE, AND DISTILLING SAID SOLUTION IN THE ABSENCE OF AN ENTRAINER TO REMOVE ANHYDROUS HYDRAZINE OVERHEAD.
References Cited (Backward Citations)
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US1833717A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |