Patent US2979505A successfully refreshed from Google Patents.
US2979505A
Expired / Lapsed
US
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Process for hydrogenation of nitrosamines
Assignee: FMC Corp
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Filing: 1957-08-06
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Granted: 1961-04-11
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Expires: 1977-08-06
Abstract
No abstract record available.
Inventors
- 👤 William B Tuemmler
- 👤 Hans J S Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:22
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/28; C07D295/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN THE PROCESS OF PREPARING A SUBSTITUTED HYDRAZINE SELECTED FROM THE GROUP CONSISTING OF N-AMINOMORPHOLINE, N-AMINOPYRROLIDINE, N-AMINOPIPERIDINE, N-AMINOPIPERAZINE, AND N,N-DIALKYLHYDRAZINES BY HYDROGENATING THE CORRESPONDING NITROSAMINE IN LIQUID PHASE IN THE PRESENCE OF A PALLADIUM CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE REACTION MIXTURE A SOLUBLE IRON SALT IN SUFFICIENT AMOUNT TO PROVIDE 0.0005 TO 225 MILLIMOLES OF IRON PER GRAM OF CATALYST.
Claim 2
Dependent Claim
63 words
IN THE PROCESS OF PREPARING A SUBSTITUTED HYDRAZINE SELECTED FROM THE GROUP CONSISTING OF N-AMINOMORPHOLINE, N-AMINOPYRROLIDINE, N-AMINOPIPERIDINE, N-AMINOPIPERAZINE, AND N,N-DIALKYLHYDRAZINES BY HYDROGENATING THE CORRESPONDING NITROSAMINE IN LIQUID PHASE IN THE PRESENCE OF A PALLADIUM CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE REACTION MIXTURE A SOLUBLE IRON SALT IN SUFFICIENT AMOUNT TO PROVIDE 0.0005 TO 225 MILLIMOLES OF IRON PER GRAM OF CATALYST.
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |