US2615025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of ethylene urea
Assignee: Mathieson Chemical Corp
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Filing: 1951-10-18
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Granted: 1952-10-21
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Expires: 1971-10-18
Abstract
No abstract record available.
Inventors
- 👤 Leland J Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:27
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32; C07D233/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR THE MANUFACTURE OF ETHYLENE UREA WHICH COMPRISES REACTING CARBONYL SULFIDE AND ETHYLENE DIAMINE IN A VOLATILE, NON-REACTIVE, ORGANIC SOLVENT, SEPARATING A SOLID INTERMEDIATE REACTION PRODUCT FROM THE REACTION MIXTURE AND RECOVERING A SOLID RESIDUE OF ETHYLENE UREA FROM THE INTERMEDIATE PRODUCT BY HEATING.
Claim 2
Dependent Claim
46 words
A PROCESS FOR THE MANUFACTURE OF ETHYLENE UREA WHICH COMPRISES REACTING CARBONYL SULFIDE AND ETHYLENE DIAMINE IN A VOLATILE, NON-REACTIVE, ORGANIC SOLVENT, SEPARATING A SOLID INTERMEDIATE REACTION PRODUCT FROM THE REACTION MIXTURE AND RECOVERING A SOLID RESIDUE OF ETHYLENE UREA FROM THE INTERMEDIATE PRODUCT BY HEATING.
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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |