US2690378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hydrazine
Assignee: Olin Industries Inc
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Filing: 1948-10-15
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Granted: 1954-09-28
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Expires: 1968-10-15
Abstract
No abstract record available.
Inventors
- 👤 Penneman Robert Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:26
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE PROCESS OF PREPARING SUBSTANTIALLY ANHYDROUS HYDRAZINE WHICH COMPRISES INTERMIXING CAUSTIC SODA AND AN AQUEOUS HYDRAZINE SOLUTION IN THE PROPORTION OF AT LEAST ONE MOLE OF CAUSTIC SODA FOR EACH MOLE OF WATER PRESENT, HEATING THE MIXTURE TO A TEMPERATURE IN THE RANGE OF ABOUT 60* C. TO 80* C., ALLOWING THE MIXTURE TO BECOME SUBSTANTIALLY QUIESCENT AND TO STRATIFY, MECHANICALLY SEPARATING THE RESULTING TWO LAYERS OF LIQUID, AND DISTILLING THE HYDRAZINE FROM THE SOLUTION OF THE UPPER LAYER.
Claim 2
Dependent Claim
79 words
THE PROCESS OF PREPARING SUBSTANTIALLY ANHYDROUS HYDRAZINE WHICH COMPRISES INTERMIXING CAUSTIC SODA AND AN AQUEOUS HYDRAZINE SOLUTION IN THE PROPORTION OF AT LEAST ONE MOLE OF CAUSTIC SODA FOR EACH MOLE OF WATER PRESENT, HEATING THE MIXTURE TO A TEMPERATURE IN THE RANGE OF ABOUT 60* C. TO 80* C., ALLOWING THE MIXTURE TO BECOME SUBSTANTIALLY QUIESCENT AND TO STRATIFY, MECHANICALLY SEPARATING THE RESULTING TWO LAYERS OF LIQUID, AND DISTILLING THE HYDRAZINE FROM THE SOLUTION OF THE UPPER LAYER.
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) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |