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Patent US3269923A successfully refreshed from Google Patents.
US3269923A
Expired / Lapsed
US
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Steam distillation of carbamate and alcohol mixtures
Assignee: Office National Industriel de lAzote
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Filing: 1962-12-28
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Granted: 1966-08-30
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Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 Roche Andre Eugene Noel
- 👤 Pomot Jean Louis Emile
- 👤 Luzarreta Emmanuel Je Francois
- 👤 Cousserans Gilbert Guy Justin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:11
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; B; B01; B01D; B01D3/00; B01D3/34; B01D3/38; C07C271/00; C07C271/06; Y; Y10; Y10S; Y10S203/00; Y10S203/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A CONTINUOUS PROCESS FOR THE SEPARATION OF CARBAMIC ACID ESTER FROM THE CRUDE ALCOHOLIC SOLUTION THEREOF OBTAINED BY REACTION BETWEEN (A) A MEMBER SELECTED FROM THE GROUP CONSISTING OF UREA AND SALTS THEREOF AND (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE ALIPHATIC, CYCLOALIPHATIC AND ARALIPHATIC MONOHYDRIC ALCOHOLS, SAID PROCESS COMPRISING SUBJECTING THE SAID CRUDE ALCOHOLIC SOLUTION TO DISTILLATION WITH STEAM, WHERE-
Claim 2
Dependent Claim
64 words
A CONTINUOUS PROCESS FOR THE SEPARATION OF CARBAMIC ACID ESTER FROM THE CRUDE ALCOHOLIC SOLUTION THEREOF OBTAINED BY REACTION BETWEEN (A) A MEMBER SELECTED FROM THE GROUP CONSISTING OF UREA AND SALTS THEREOF AND (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE ALIPHATIC, CYCLOALIPHATIC AND ARALIPHATIC MONOHYDRIC ALCOHOLS, SAID PROCESS COMPRISING SUBJECTING THE SAID CRUDE ALCOHOLIC SOLUTION TO DISTILLATION WITH STEAM, WHERE-
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |