US2849357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrazine
Assignee: Olin Corp
•
Filing: 1955-12-12
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Granted: 1958-08-26
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Expires: 1975-12-12
Abstract
No abstract record available.
Inventors
- 👤 John C Devins
- 👤 Burton Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:00
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/16; B; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
THE METHOD OF PREPARING HYDRAZINE WHICH COMPRISES SUBJECTING AMMONIA AT A PRESSURE OF SUBSTANTIALLY 3 TO 10 MILLIMETERS OF MERCURY TO A DIRECT CURRENT ELECTRICAL GLOW DISCHARGE FORMED AT A VOLTAGE OF ABOUT 25 TO 70 VOLTS PER CENTIMETER AND AT A CURRENT DENSITY OF SUBSTANTIALLY 0.6 TO 6.0 MILLIAMPERES PER SQUARE CENTIMETER BETWEEN ELECTRODES SPACED SUBSTANTIALLY 50 TO 160 CENTIMETERS APART, AT LEAST ABOUT 95% OF THE ELECTRICAL ENERGY IMPUT INTO THE SAID DISCHARGE BEING EXPENDED IN THE POSITIVE REGION, AND CAUSING THE AMMONIA TO FLOW TRANSVERSELY THROUGH THE SAID POSITIVE REGION WITH A RESIDENCE TIME THEREIN OF NOT MORE THAN 10 MILLISECONDS.
References Cited (Backward Citations)
US974741A
Cited
US1079705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |