Patent US3171044A successfully refreshed from Google Patents.
Patent US2749217A successfully refreshed from Google Patents.
US2749217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydroxylamine and semicarbazide salts
Assignee: Spencer Chemical Co
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Filing: 1953-10-12
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Granted: 1956-06-05
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Expires: 1973-10-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Archie J Deutschman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:26
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/14; C01B21/1409; C01B21/1454
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR THE CATALYTIC REDUCTION OF NITROUREA WHICH COMPRISES, REACTING SOLUBILIZED NITROUREA WITH HYDROGEN PRESENT IN EXCESS OF THE STOICHIOMETRIC AMOUNT IN THE PRESENCE OF AN ACIDIFYING AGENT SELECTED FROM THE GROUP CONSISING OF SULFURIC, ORTHOPHOSPHORIC, HYDROCHLORIC, SULFAMIC, P-TOLUENE SULFONIC, FORMIC, OXALIC, HYDROBROMIC, HYDROIODIC AND ACETIC ACIDS AND A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ACTIVATED RHODIUM, PALADIUM, PLATINUM, AND ALLOYS THEREOF AT A TEMPERATURE IN THE ORDER OF -25* C. TO 100* C. TO PRODUCE A REACTION MIXTURE CONTAINING AT LEAST ONE HIGHLY ACTIVE NITROGEN CONTAINING REDUCING SUBSTANCE IN THE FORM OF 15 SALT SELECTED FROM THE GROUP CONSISTING OF HYDROXYLAMINE SALTS, SEMICARBAZIDE SALTS AND THEIR MIXTURES.
Claim 2
Dependent Claim
111 words
A PROCESS FOR THE CATALYTIC REDUCTION OF NITROUREA WHICH COMPRISES, REACTING SOLUBILIZED NITROUREA WITH HYDROGEN PRESENT IN EXCESS OF THE STOICHIOMETRIC AMOUNT IN THE PRESENCE OF AN ACIDIFYING AGENT SELECTED FROM THE GROUP CONSISING OF SULFURIC, ORTHOPHOSPHORIC, HYDROCHLORIC, SULFAMIC, P-TOLUENE SULFONIC, FORMIC, OXALIC, HYDROBROMIC, HYDROIODIC AND ACETIC ACIDS AND A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ACTIVATED RHODIUM, PALADIUM, PLATINUM, AND ALLOYS THEREOF AT A TEMPERATURE IN THE ORDER OF -25* C. TO 100* C. TO PRODUCE A REACTION MIXTURE CONTAINING AT LEAST ONE HIGHLY ACTIVE NITROGEN CONTAINING REDUCING SUBSTANCE IN THE FORM OF 15 SALT SELECTED FROM THE GROUP CONSISTING OF HYDROXYLAMINE SALTS, SEMICARBAZIDE SALTS AND THEIR MIXTURES.
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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |