Patent US4123433A successfully refreshed from Google Patents.
US4123433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-Cyano-5-(substituted triphenylmethyl) pyridines
Assignee: Merck Sharp & Dohme LLC
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Filing: 1977-08-12
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Granted: 1978-10-31
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Expires: 1997-08-12
Abstract
Abstract Disclosed herein are novel 5-tritylpicolinic acids, amides, esters and pharmaceutically acceptable salts thereof. Also disclosed are methods for the use of said novel compounds as anti-acne agents.
Inventors
- 👤 Margaret H. Sherlock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:39
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/10; C07D211/12; C07D213/60; C07D213/61; C07D213/62; C07D213/63; C07D213/64; C07D213/78; C07D213/79; C07D213/81; C07D213/84; C07D213/89; C07D295/00; C07D295/02; C07D295/027
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A compound of the formula ##STR5## and the pharmaceutically acceptable salts thereof wherein R is hydrogen or alkyl; each R 1 is a member selected from the group consisting of hydrogen, hydroxy, alkyl, alkoxy, trifluoromethyl and phenyl wherein said alkyl or alkoxy contains up to 12 carbon atoms.
Claim 2
Dependent Claim
48 words
A compound of the formula ##STR5## and the pharmaceutically acceptable salts thereof wherein R is hydrogen or alkyl; each R 1 is a member selected from the group consisting of hydrogen, hydroxy, alkyl, alkoxy, trifluoromethyl and phenyl wherein said alkyl or alkoxy contains up to 12 carbon atoms.
Claim 3
Dependent Claim
19 words
A compound of claim 1 wherein R is hydrogen and each R 1 is as defined in said claim.
Claim 4
Dependent Claim
17 words
The compound of claim 2 wherein R and each R 1 are hydrogen said compound being 2-cyano-5-(triphenylmethyl)-pyridine.
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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |