US2653899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erythromycin, its salts, and method of preparation
Assignee: Eli Lilly and Co
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Filing: 1952-04-14
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Granted: 1953-09-29
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Expires: 1972-04-14
Abstract
No abstract record available.
Inventors
- 👤 Robert L Bunch
- 👤 James M Mcguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:20
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/20; C12N1/205; C07; C07H; C07H17/00; C07H17/04; C07H17/08; C12P; C12P19/00; C12P19/44; C12P19/60; C12P19/62; C12R; C12R2001/00; C12R2001/01; C12R2001/465; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
AN ANTIBIOTIC SUBSTANCE OF THE GROUP CONSISTING OF NITROGENOUS BASE AND THE ACID SOLUTION SALTS THEREOF, SAID BASE HAVING THE FOLLOWING PROPERTIES: A MOLECULAR WEIGHT OF ABOUT 74+7, OBTAINED FROM TITRATION DATA; A PK'' A OF 8.7 WHEN TITRATED IN DIMETHYLFORMAMIDE-WATER SOLUTION (2:1, PARTS BY VOLUME); AND, IN A CHLOROFORM SOLUTION OF ABOUT 3.14 PERCENT CONCENTRATION (WEIGHT-VOLUME) THE FOLLOWING DISTINGUISHABLE BANDS IN AN INFRA-RED ABSORPTION SPECTRUM OVER THE RANGE OF 2.4U. TO 12.0U: 2.82, 3.32, 5.77, 5.91, 6.86, 7.13, 7.25, 7.42, 7.78, 8.02, 8.54, 8.98, 9.16, 9.32, 9.49. 9.86, 10.23, 10.42, 10.9, 11.17, 11.55 AND 11.9.
References Cited (Backward Citations)
US2378449A
Cited
US2474758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |