US2564889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing antibacterial substance
Assignee: Merck and Co Inc
•
Filing: 1942-11-14
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Granted: 1951-08-21
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Expires: 1962-11-14
Abstract
No abstract record available.
Inventors
- 👤 Karl A Folkers
- 👤 Robert L Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:54
CPC Classifications
C; C12; C12P; C12P1/00; C12P1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE PROCESS FOR OBTAINING A SUBSTANCE HAVING ANTIBACTERIAL ACTIVITY AGAINST E. COLI THAT COMPRISES EXTRACTING CULTURE MATS OF PENICILLIUM NOTATUM SP. WITH AN ORGANIC SOLVENT OF THE CLASS CONSISTING OF ACETONE, CHLOROFORM, AND LOWER ALIPHATIC ALCOHOLS, CONCENTRATING THE EXTRACTS THUS OBTAINED TO FORM A PRECIPITATE, DISSOLVING SAID PRECIPITATE IN AN AQUEOUS ALKALINE SOLUTION, PASSING CARBON DIOXDE INTO SAID AQUEOUS ALKALINE SOLUTION TO FORM A NEW PRECIPITATE,AND RECOVERING SAID LAST NAMED PRECIPITATE.
Claim 2
Dependent Claim
71 words
THE PROCESS FOR OBTAINING A SUBSTANCE HAVING ANTIBACTERIAL ACTIVITY AGAINST E. COLI THAT COMPRISES EXTRACTING CULTURE MATS OF PENICILLIUM NOTATUM SP. WITH AN ORGANIC SOLVENT OF THE CLASS CONSISTING OF ACETONE, CHLOROFORM, AND LOWER ALIPHATIC ALCOHOLS, CONCENTRATING THE EXTRACTS THUS OBTAINED TO FORM A PRECIPITATE, DISSOLVING SAID PRECIPITATE IN AN AQUEOUS ALKALINE SOLUTION, PASSING CARBON DIOXDE INTO SAID AQUEOUS ALKALINE SOLUTION TO FORM A NEW PRECIPITATE,AND RECOVERING SAID LAST NAMED PRECIPITATE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |