Patent US4123539A successfully refreshed from Google Patents.
US4123539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-Ethylpenicillanic acid
Assignee: Merck and Co Inc
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Filing: 1977-12-29
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Granted: 1978-10-31
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Expires: 1997-12-29
Abstract
Abstract Disclosed are the antibiotics 6-ethylpenicillanic acid and 6-ethylpenicillanic acid sulfoxide (I): <IMAGE> I X = S, SO Also disclosed are processes for preparing I and its pharmaceutically acceptable salts and esters; pharmaceutical compositions comprising such compounds; and methods of treatment comprising administering such compounds and compositions when an antibiotic effect is indicated.
Inventors
- 👤 Frank P. DiNinno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:35
CPC Classifications
C; C07; C07D; C07D499/00; C07D499/88; C07D495/00; C07D495/02; C07D495/04; Y; Y02; Y02A; Y02A50/00; Y02A50/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
18 words
A compound having the structure: ##STR7## wherein: X is S or SO; and the pharmaceutically acceptable salts thereof.
Claim 2
Dependent Claim
18 words
A compound having the structure: ##STR7## wherein: X is S or SO; and the pharmaceutically acceptable salts thereof.
Claim 3
Dependent Claim
14 words
A compound having the structure: ##STR8## wherein R is a readily removable protecting group.
Claim 4
Dependent Claim
14 words
A compound having the structure: ##STR8## wherein R is a readily removable protecting group.
Claim 5
Dependent Claim
24 words
A pharmaceutical composition comprising, in unitary dosage form, a therapeutically effective amount of a compound according to claim 1 and a pharmaceutical carrier therefor.
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 |