US3063806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of anhydrous hydrazine
Assignee: Bayer AG
•
Filing: 1959-12-15
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Granted: 1962-11-13
•
Expires: 1979-12-15
Abstract
No abstract record available.
Inventors
- 👤 Henrich Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
METHOD FOR THE PREPARATION OF SUBSTANTIALLY ANHYDROUS HYDRAZINE FROM AQUEOUS HYDRAZINE SOLUTIONS, SAID METHOD COMPRISING THE STEPS OF ADING AN ALKALI METAL HYDROXIDE TO THE AQUEOUS HYDRAZINE SOLUTION IN AN AMOUNT OF ABOUT 0.1 TO 0.5 MOL OF ALKALI METAL HYDROXIDE FOR EACH MOL OF WATER PRESENT, EXTRACTING THE SOLUTION THEREBY PRODUCED WITH AN AROMATIC AMINE WHEREBY SAID HYDRAZINE IS REMOVED FROM THE AQUEOUS SOLUTION INTO SAID AROMATIC AMINE AND RECOVERING THE HYDRAZINE THEREFROM.
Claim 2
Dependent Claim
74 words
METHOD FOR THE PREPARATION OF SUBSTANTIALLY ANHYDROUS HYDRAZINE FROM AQUEOUS HYDRAZINE SOLUTIONS, SAID METHOD COMPRISING THE STEPS OF ADING AN ALKALI METAL HYDROXIDE TO THE AQUEOUS HYDRAZINE SOLUTION IN AN AMOUNT OF ABOUT 0.1 TO 0.5 MOL OF ALKALI METAL HYDROXIDE FOR EACH MOL OF WATER PRESENT, EXTRACTING THE SOLUTION THEREBY PRODUCED WITH AN AROMATIC AMINE WHEREBY SAID HYDRAZINE IS REMOVED FROM THE AQUEOUS SOLUTION INTO SAID AROMATIC AMINE AND RECOVERING THE HYDRAZINE THEREFROM.
References Cited (Backward Citations)
CA584845A
Cited
US2698286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |