US3321284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of hydrazine from aqueous solution using a fluorinated alcohol
Assignee: Shell USA Inc
•
Filing: 1963-08-23
•
Granted: 1967-05-23
•
Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur K Dunlop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:39
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
AN EXTRACTION PROCESS FOR SEPARATING HYDRAZINE FROM AQUEOUS SOLUTION THEREOF WHICH COMPRISES: (A) MIXING A WAER IMMISCIBLE C5-21 FLUOROALCOHOL CONTAINING AT LEAST FIVE SUBSTITUTED FLUORINE ATOMS WITH THE AQUEOUS HYDRAZINE FEED SOLUTION, (B) ALLOWING THE MIXUTE TO SETTLE AND DECANTING OFF A HYDRAZINE-FLUOROALCOHOL LAYER AND (C) DISTILLING THE HYDRAZINE-FLUOROALCOHOL LAYER TO SEPARATE AND RECOVER THE HYDRAZINE AS A PRODUCT.
Claim 2
Dependent Claim
59 words
AN EXTRACTION PROCESS FOR SEPARATING HYDRAZINE FROM AQUEOUS SOLUTION THEREOF WHICH COMPRISES: (A) MIXING A WAER IMMISCIBLE C5-21 FLUOROALCOHOL CONTAINING AT LEAST FIVE SUBSTITUTED FLUORINE ATOMS WITH THE AQUEOUS HYDRAZINE FEED SOLUTION, (B) ALLOWING THE MIXUTE TO SETTLE AND DECANTING OFF A HYDRAZINE-FLUOROALCOHOL LAYER AND (C) DISTILLING THE HYDRAZINE-FLUOROALCOHOL LAYER TO SEPARATE AND RECOVER THE HYDRAZINE AS A PRODUCT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |