US2834775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamate compounds
Assignee: Rohm and Haas Co
•
Filing: 1954-08-19
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Granted: 1958-05-13
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Expires: 1974-08-19
Abstract
No abstract record available.
Inventors
- 👤 Fred E Boettner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:18
CPC Classifications
C; C07; C07D; C07D269/00; C07D269/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A METHOD FOR PREPARING THE CYLIC URETHANES OF N-ALKYL-N-SORBITYLCARBAMIC ACID WHICH COMRPISES REACTING AN N-ALKYLGLUCAMINE, IN WHICH THE ALKYL GROUP CONTAINS ONE TO EIGHTEEN CARBON ATOMS, AND UREA AT A TEMPERATURE OF 140 TO 175*C. UNTIL TWO EQUIVALENTS OF AMMONIA ARE LIBERATED.
Claim 2
Independent Claim
42 words
A METHOD FOR PREPARING THE CYLIC URETHANES OF N-ALKYL-N-SORBITYLCARBAMIC ACID WHICH COMRPISES REACTING AN N-ALKYLGLUCAMINE, IN WHICH THE ALKYL GROUP CONTAINS ONE TO EIGHTEEN CARBON ATOMS, AND UREA AT A TEMPERATURE OF 140 TO 175*C. UNTIL TWO EQUIVALENTS OF AMMONIA ARE LIBERATED.
Claim 3
Dependent Claim
28 words
AS NEW COMPOSITIONS OF MATTER, THE CYCLIC URETHANES OF N-ALKYL-N-SORBITYLACARBAMIC ACID, IN WHICH THE ALKYL GROUP CONTAINS ONE TO EIGHTEEN CARBON ATOMS, FORMED EQUIVALENTS OF AMMONIA ARE LIBERATED.
Claim 4
Dependent Claim
28 words
AS NEW COMPOSITIONS OF MATTER, THE CYCLIC URETHANES OF N-ALKYL-N-SORBITYLACARBAMIC ACID, IN WHICH THE ALKYL GROUP CONTAINS ONE TO EIGHTEEN CARBON ATOMS, FORMED EQUIVALENTS OF AMMONIA ARE LIBERATED.
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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |