Patent US2650217A successfully refreshed from Google Patents.
US2650217A
Expired / Lapsed
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Production of quinine-penicillin
Assignee: Merck and Co Inc
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Filing: 1950-08-24
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Granted: 1953-08-25
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Expires: 1970-08-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Macek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/41; A61K31/425; A61K31/429; A61K31/43; C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
THE PROCESS OF PRODUCING QUININE PENCILLIN OF LOWERED BULK WHICH COMPRISES SLURRYING CRYSTALLINE QUININE PENICILLIN WITH DIETHYL ETHER.
Claim 2
Dependent Claim
18 words
THE PROCESS OF PRODUCING QUININE PENCILLIN OF LOWERED BULK WHICH COMPRISES SLURRYING CRYSTALLINE QUININE PENICILLIN WITH DIETHYL ETHER.
References Cited (Backward Citations)
US2438106A
Cited
US2515898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |