US3598546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparing anhydrous hydrazine using an activated aluminum oxide drying agent
Assignee: ROCKET RESEARCH CORP OF AMERIC
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Filing: 1969-11-26
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Granted: 1971-08-10
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Expires: 1989-11-26
Abstract
Abstract HYDRAZINE, MONOMETHYL HYDRAZINE, DIMETHYL HYDRAZINE AND OTHER CLOSELY RELATED HYDRAZINE COMPOUNDS ARE PRESSENTLY AVAILABLE AS LIQUIDS CONTAINING SMALL AMOUNTS OF WATER (E.G. 1%) WHICH AFFECTS THEIR PROPERTIES TO A VERY GREAT EXTENT. THE PRESENT INVENTION PROVIDES A PHYSICAL PROCEDURE FOR REMOVING SUCH WATER WITHOUT HEATING THE HYDRAZINE AND WITHOUT THE FORMATION OF DANGEROUS BYPRODUCTS.
Inventors
- 👤 Carl D Good
- 👤 Donald R Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:56
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/16
Claims Analysis
Total Claims: 0
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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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |