US3903110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(2-pyrrolidinonyl) methyl carbamate derivatives
Assignee: ISP Investments LLC
•
Filing: 1972-04-27
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Granted: 1975-09-02
•
Expires: 1992-04-27
Abstract
Abstract Compounds having the formula D R A W I N G wherein n is 1 or 2 and R is a monovalent or divalent aliphatic, alicyclic or aryl radical produced by the reaction of n moles of an isocyanate or diisocynate with n moles of N-hydroxymethyl-2pyrrolidinone and uses thereof.
Inventors
- 👤 Harlan Benjamin Freyermuth
- 👤 David I Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:53
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D207/263; C07D207/27
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
13 words
A compound as defined in claim 1 wherein R is phenyl or naphthyl.
Claim 4
Dependent Claim
11 words
The compound as defined in claim 1 which is N-phenyl-2-pyrrolidinonyl-methyl carbamate.
Claim 5
Dependent Claim
11 words
The compound as defined in claim 1 which is n-2-chlorophenyl-2-pyrrolidinonyl-methyl carbamate.
Claim 6
Dependent Claim
11 words
The compound as defined in claim 1 which is N-3-chlorophenyl-2-pyrrolidinonyl-methyl carbamate.
Claim 7
Dependent Claim
11 words
The compound as defined in claim 1 which is N-4-chlorophenyl-2-pyrrolidinonyl-methyl carbamate.
Claim 8
Dependent Claim
11 words
The compound as defined n claim 1 which is N-3,4-dichlorophenyl-2-pyrrolidinonyl-methyl carbamate,
Claim 9
Dependent Claim
11 words
The compound as defined in claim 1 which is N-2-nitrophenyl-2-pyrrolidinonyl-methyl carbamate.
Claim 10
Dependent Claim
11 words
The compound as defined in claim 1 which is N-4-nitrophenyl-2-pyrrolidinonyl-methyl carbamate.
Claim 11
Dependent Claim
11 words
The compound as defined in claim 1 which is N-1-naphthyl-2-pyrrolidinonyl-methyl carbamate.
Claim 12
Dependent Claim
18 words
The compound as defined in claim 1 where R is an alkyl having from 1 to 6 carbons.
Claim 13
Dependent Claim
12 words
The compound as defined in claim 1 which is designated N-trichloroacetyl-2-pyrrolidinonyl-methyl carbamate.
Claim 14
Dependent Claim
10 words
The compound as defined in claim 11 designated N-ethyl-2-pyrrolidinonyl-methyl carbamate.
References Cited (Backward Citations)
US2700039A
Cited
US3001955A
Cited
US2945863A
Cited
US3073834A
Cited
US3370079A
Cited
US3287471A
Cited
US3449360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |