US3277098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Di-urethanes and processes for their production
Assignee: Bayer AG
•
Filing: 1961-10-05
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Granted: 1966-10-04
•
Expires: 1981-10-05
Abstract
No abstract record available.
Inventors
- 👤 Merten Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:24
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/36; C07D213/40; C07D211/00; C07D211/04; C07D211/68; C07D211/70; C07D211/72; C07D217/00; C07D217/02; C07D217/06; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/10; C07D221/12; C07D221/22; C07D265/00; C07D265/04; C07D265/06; C07D265/08; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/42; C10; C10M; C10M3/00; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/10; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/28; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10N; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR THE PRODUCTION OF AN O-ALKYL ESTER OF AN N-ALKYLCARBAMIC ACID WHICH COMPRISES REACTING IN AN INERT HYDROCARBON MEDIUM (A) AN ALDEHYDE OF THE GROUP CONSISTING OF ALIPHATIC, CARBOCYCLIC ARALIPHATIC AND HETEROCYCLIC MONOALDEHYDES, (B) AN O-ALKYL ESTER OF CARBAMIC ACID, AND (C) AN UNSATURATED COMPOUND OF THE GROUP CONSISTING OF ALPHA OLEFINS, COMJUGATED DIOLEFINS, AND VINYL AROMATIC COMPOUNDS, IN THE PRESENCE OF A LEWIS ACID CATALYST AT A TEMPERATURE BETWEEN ABOUT 20* AND ABOUT 180*C., AND RECOVERING THE RESULTING 0-ALKYL ESTER OF THE N-ALKYLCARBAMIC ACID.
Claim 2
Dependent Claim
87 words
A PROCESS FOR THE PRODUCTION OF AN O-ALKYL ESTER OF AN N-ALKYLCARBAMIC ACID WHICH COMPRISES REACTING IN AN INERT HYDROCARBON MEDIUM (A) AN ALDEHYDE OF THE GROUP CONSISTING OF ALIPHATIC, CARBOCYCLIC ARALIPHATIC AND HETEROCYCLIC MONOALDEHYDES, (B) AN O-ALKYL ESTER OF CARBAMIC ACID, AND (C) AN UNSATURATED COMPOUND OF THE GROUP CONSISTING OF ALPHA OLEFINS, COMJUGATED DIOLEFINS, AND VINYL AROMATIC COMPOUNDS, IN THE PRESENCE OF A LEWIS ACID CATALYST AT A TEMPERATURE BETWEEN ABOUT 20* AND ABOUT 180*C., AND RECOVERING THE RESULTING 0-ALKYL ESTER OF THE N-ALKYLCARBAMIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |