US3892800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trichloroamino (and acylamino)phenylalkanoic acids and esters thereof
Assignee: STWB Inc
•
Filing: 1973-04-06
•
Granted: 1975-07-01
•
Expires: 1993-04-06
Abstract
Abstract Trichloroamino(and acylamino)phenylalkanoic acids or esters, useful as uricosuric agents, are prepared by chlorination of the corresponding aminophenylalkanoic acids or esters, followed, if desired, by N-acylation and N-alkylation.
Inventors
- 👤 Ardie R Nickel
- 👤 Franklin J Rosenberg
- 👤 James H Ackerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:56
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/74
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
3 words
A COMPOUND FORMULA
Claim 2
Dependent Claim
3 words
A COMPOUND FORMULA
Claim 3
Dependent Claim
10 words
A compound according to claim 1 wherein R* is hydrogen.
Claim 4
Dependent Claim
12 words
A compound according to claim 1 wherein R* and R'''' are hydrogen.
Claim 5
Dependent Claim
13 words
A compound according to claim 1 wherein R*, R'''' and R'''' are hydrogen.
Claim 6
Dependent Claim
6 words
3-Amino-2,4,6-trIchlorohydrocinnamic acid, according to claim 4.
Claim 7
Dependent Claim
21 words
A compound according to claim 1 wherein R*, R'' and R'''' are hydrogen and R is alkyl of 1-4 carbon atoms.
Claim 8
Dependent Claim
8 words
3-Amino-2,4,6-trichloro- Alpha -ethylhydrocinnamic acid, according to claim 6.
Claim 9
Dependent Claim
20 words
A compound according to claim 1 wherein R* and R'''' are hydrogen, and R'' is lower-alkanoyl of 1-6 carbon atoms.
Claim 10
Dependent Claim
21 words
A compound according to claim 1 wherein R, R* and R'''' are hydrogen, and R'' is lower-alkanoyl of 1-6 carbon atoms.
Claim 11
Dependent Claim
6 words
3-(n-Butyramido)-2,4,6-trichlorohydrocinnamic acid, according to claim 9.
Claim 12
Dependent Claim
27 words
A compound according to claim 1 wherein R is lower-alkyl of 1-4 carbon atoms, R* and R'''' are hydrogen, and R'' is lower-alkanoyl of 1-6 carbon atoms.
Claim 13
Dependent Claim
23 words
A compound according to claim 1 wherein R is ethyl, R* and R'''' are hydrogen, and R'' is lower-alkanoyl of 1-6 carbon atoms.
Claim 14
Dependent Claim
8 words
3-(n-Butyramido)-2,4,6-trichloro- Alpha -ethylhydrocinnamic acid, according to claim 12.
Claim 15
Dependent Claim
8 words
3-Acetamido-2,4,6-trichloro- Alpha -ethylhydrocinnamic acid, according to claim 12.
Claim 16
Dependent Claim
27 words
A compound according to claim 1 wherein R and R'''' are lower-alkyl of 1-4 carbon atoms, R* is hydrogen, and R'' is lower-alkanoyl of 1-6 carbon atoms.
Claim 17
Dependent Claim
8 words
3-(N-Methylacetamido)-2,4,6-trichloro- Alpha -ethylhydrocinnamic acid, according to claim 15.
Claim 18
Dependent Claim
8 words
3-(N-Ethylacetamido)-2,4,6-trichloro- Alpha -ethylhydrocinnamic acid, according to claim 15.
References Cited (Backward Citations)
US3100226A
Cited
US3703546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |