US2780531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrazine recovery
Assignee: Olin Corp
•
Filing: 1954-02-23
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Granted: 1957-02-05
•
Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Richard N Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:08
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
AN EXTRACTION PROCESS FOR DEHYDRATING AQUEOUS HYDRAZINE WHICH COMPRISES MIXING AN ORGANIC ACID HAVING AN IONIZATION CONSTANT OF NOT MORE THAN 1.3X10-10 AT 25*C. WITH THE AQUEOUS HYDRAZINE MIXTURE AND DECANTING A HYDRAZINE-ACID LAYER FROM THE AQUEOUS MIXTURE.
Claim 2
Dependent Claim
38 words
AN EXTRACTION PROCESS FOR DEHYDRATING AQUEOUS HYDRAZINE WHICH COMPRISES MIXING AN ORGANIC ACID HAVING AN IONIZATION CONSTANT OF NOT MORE THAN 1.3X10-10 AT 25*C. WITH THE AQUEOUS HYDRAZINE MIXTURE AND DECANTING A HYDRAZINE-ACID LAYER FROM THE AQUEOUS MIXTURE.
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |