US3819623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3,7-disubstituted cephalosporin compounds
Assignee: Astellas Pharma Inc
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Filing: 1969-10-23
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Granted: 1974-06-25
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Expires: 1989-10-23
Abstract
Abstract THE CEPHALOSPORIN COMPOUND OF THIS INVENTION IS THE SODIUM SALT OF 7-(1H-TETRAZOL-1-YLACETAMIDO)-3-(5-METHYL-1,3,4-THIADIAZOL-2-YL-THIOMETHYL) -3-CEPHEM-4-CARBOXYLIC ACID IN THE FORM OF THE HYDRATES CONTAINING 5 MOLECULES OF WATER AND 3/2 MOLECULES OF WATER AND IN AMORPHOUS FORM. SAID NOVEL SALTS CAN BE STORED FOR A PROLONGED PERIOD OF TIME WITHOUT ANY LOSS IN POTENCY WHEN USED THERAPEUTICALLY AGAINST A NUMBER OF MICROORGANISMS INCLUDING GRAM-POSITIVE AND GRAM-NEGATIVE BACTERIA. FURTHERMORE A NUMBER OF HIGHLY EFFECTIVE ANTIBACTERIAL 7ACYLATED AMINO-3-(THIOLATED METHYL)CEPH-3-3M-4-CARBOXYLIC ACIDS AND THEIR SALTS ARE DESCRIBED.
Inventors
- 👤 T Takano
- 👤 M Kurita
- 👤 H Nikaido
- 👤 R Okui
- 👤 M Mera
- 👤 N Konishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:28
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; C07D271/00; C07D271/02; C07D271/10; C07D271/113; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125
Claims Analysis
Total Claims: 0
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |