US4424395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamates of biphenyls
Assignee: Dow Chemical Co
•
Filing: 1982-03-11
•
Granted: 1984-01-03
•
Expires: 2002-03-11
Abstract
Abstract Difunctional ethylenically unsaturated carbamate derivatives of 4,4'-dihydroxybiphenyl compounds are disclosed.
Inventors
- 👤 Robert M. Strom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:08
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
A compound corresponding to the formula: wherein: R 1 and R 2 are selected from the group consisting of hydrogen, C 1-4 alkyl, and phenyl; A each occurrence is independently a C 2-4 vicinal alkylene group; n is an integer from zero to about 20; and R is an ethylenically unsaturated aliphatic moiety selected from the group consisting of --CR'═CH 2 and --CH 2 CH 2 OC(O)CR'═CH 2 where R' is hydrogen or methyl.
Claim 2
Dependent Claim
74 words
A compound corresponding to the formula: wherein: R 1 and R 2 are selected from the group consisting of hydrogen, C 1-4 alkyl, and phenyl; A each occurrence is independently a C 2-4 vicinal alkylene group; n is an integer from zero to about 20; and R is an ethylenically unsaturated aliphatic moiety selected from the group consisting of --CR'═CH 2 and --CH 2 CH 2 OC(O)CR'═CH 2 where R' is hydrogen or methyl.
Claim 3
Dependent Claim
10 words
A compound according to claim 1 wherein n is zero.
Claim 4
Dependent Claim
18 words
A compound according to claim 2 wherein R 1 and R 2 are hydrogen, methyl or tertiary butyl.
Claim 5
Dependent Claim
16 words
A compound according to claim 3 wherein R is --CH 2 CH 2 OC(O)CR'═CH 2 .
Claim 6
Dependent Claim
10 words
A compound according to claim 4 which is 3,3',5,5'-tetrakis(1,1-dimethylethyl)-1,1'-biphenyl-4,4'-diyl bis(oxycarbonylamino-2,1-ethanediyl)bis(2-methyl-2-propenoate).
Claim 7
Dependent Claim
12 words
A compound according to claim 3 wherein R is --CR'═CH 2 .
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) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |