Patent US2589289A successfully refreshed from Google Patents.
US2589289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure reaction of carbon monoxide with hydrazine
Assignee: EIDP Inc
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Filing: 1948-03-31
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Granted: 1952-03-18
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Expires: 1968-03-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Herman J Sampson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:22
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR PRODUCING SEMICARBAZIDE AND HYDRAZODICARBONAMIDE WHICH COMPRISES REACTING CARBON MONOXIDE WITH HYDRAZINE IN THE PRESENCE OF A METAL CARBONYL CATALYST AT A TEMPERATURE FROM 0* TO 200* C. UNDER SUPERATMOSPHERIC PRESSURE IN EXCESS OF 5 ATMOSPHERES, AND ISOLATING FROM THE REACTION MIXTURE ONE OF SAID COMPOUNDS SEMICARBAZIDE AND HYDRAZODICARBONAMIDE.
Claim 2
Dependent Claim
51 words
A PROCESS FOR PRODUCING SEMICARBAZIDE AND HYDRAZODICARBONAMIDE WHICH COMPRISES REACTING CARBON MONOXIDE WITH HYDRAZINE IN THE PRESENCE OF A METAL CARBONYL CATALYST AT A TEMPERATURE FROM 0* TO 200* C. UNDER SUPERATMOSPHERIC PRESSURE IN EXCESS OF 5 ATMOSPHERES, AND ISOLATING FROM THE REACTION MIXTURE ONE OF SAID COMPOUNDS SEMICARBAZIDE AND HYDRAZODICARBONAMIDE.
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) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |