Patent US3981905A successfully refreshed from Google Patents.
US3981905A
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2-(Substituted phenyl) propionic acids
Assignee: Boots Co PLC
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Filing: 1973-11-13
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Granted: 1976-09-21
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Expires: 1993-11-13
Abstract
Abstract 2-(Substituted phenyl)propionic acids and salts, esters, amides and alcohols derived therefrom, said substituents being halogen atoms, useful an anti-inflammatory agents, and their preparation.
Inventors
- 👤 Stewart Sanders Adams
- 👤 Bernard John Armitage
- 👤 John Stuart Nicholson
- 👤 James Gordon Tantum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:50
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/58; C07C59/64; C07C205/00; C07C205/45; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
A compound of the formula ##SPC12## in which R 1 is halogen; R 2 and R 3 are each selected from the group consisting of hydrogen and halogen, with the proviso that at least one of R 2 and R 3 is hydrogen; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
Claim 2
Dependent Claim
57 words
A compound of the formula ##SPC12## in which R 1 is halogen; R 2 and R 3 are each selected from the group consisting of hydrogen and halogen, with the proviso that at least one of R 2 and R 3 is hydrogen; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
Claim 3
Dependent Claim
24 words
A compound as claimed in claim 1 wherein at least one of R 1 , R 2 and R 3 is a fluorine atom.
Claim 4
Dependent Claim
17 words
A 2-[4-(4-fluorophenoxy)phenyl]propionic acid; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
Claim 5
Dependent Claim
17 words
A 2-[4-(4-fluorophenoxy)phenyl]propionic acid; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
Claim 6
Dependent Claim
17 words
A 2-[4-(2,4-difluorophenoxy)phenyl]propionic acid; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
Claim 7
Dependent Claim
17 words
A 2-[4-(2,4-difluorophenoxy)phenyl]propionic acid; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
Claim 8
Dependent Claim
17 words
A 2-[4-(4-chlorophenoxy)phenyl]propionic acid; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
Claim 9
Dependent Claim
17 words
A 2-[4-(4-chlorophenoxy)phenyl]propionic acid; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
Claim 10
Dependent Claim
17 words
A 2-[3-bromo-4-(4-fluorophenoxy)phenyl]propionic acid; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
Claim 11
Dependent Claim
17 words
A 2-[3-bromo-4-(4-fluorophenoxy)phenyl]propionic acid; together with the pharmaceutically acceptable lower alkyl esters, inorganic salts and organic salts thereof.
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) | 1979-09-21 | 1980-03-22 | 1980-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-21 | 1984-03-22 | 1984-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-21 | 1988-03-22 | 1988-09-21 | $7700.00 | Window Closed / Lapsed |