US4754030A
Expired / Lapsed
US
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Cefbuperazone crystalline triethylamine salt
Assignee: Bristol Myers Co
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Filing: 1985-02-01
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Granted: 1988-06-28
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Expires: 2005-02-01
Abstract
Abstract The crystalline triethylamine salt of cefbuperazone is stable in the dry state and soluble in water and in aqueous injection vehicles.
Inventors
- 👤 Murray A. Kaplan
- 👤 Robert A. Lipper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:28
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
The crystalline triethylamine salt of cefbuperazone which exhibits mp 160°-163° C., has the elemental composition corresponding to the formula C 22 H 29 N 9 O 9 S 2 .C 6 H 15 N and exhibits substantially the X-Ray powder diffraction pattern described below determined with a Rigaku X-Ray Powder Diffractometer operated with a Cu 25 kv lamp and a nickel filter at a scan rate of 2° per minute over the range of from 40° to 5°. ______________________________________
Estimated
d-Spacing (Å)
Relative Intensity (%)
______________________________________
9.2 66.7
8.18 14.3
6.96 33.3
6.70 55.6
5.70 17.5
4.82 63.5
4.07 100.0
3.97 27.0
3.67 14.3
3.63 15.9
3.24 17.5
______________________________________
Claim 2
Dependent Claim
109 words
The crystalline triethylamine salt of cefbuperazone which exhibits mp 160°-163° C., has the elemental composition corresponding to the formula C 22 H 29 N 9 O 9 S 2 .C 6 H 15 N and exhibits substantially the X-Ray powder diffraction pattern described below determined with a Rigaku X-Ray Powder Diffractometer operated with a Cu 25 kv lamp and a nickel filter at a scan rate of 2° per minute over the range of from 40° to 5°. ______________________________________
Estimated
d-Spacing (Å)
Relative Intensity (%)
______________________________________
9.2 66.7
8.18 14.3
6.96 33.3
6.70 55.6
5.70 17.5
4.82 63.5
4.07 100.0
3.97 27.0
3.67 14.3
3.63 15.9
3.24 17.5
______________________________________
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) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |