US3830700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test for beta-lactamase activity using chromogenic cephalosporin compound
Assignee: Glaxo Laboratories Ltd
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Filing: 1972-10-03
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Granted: 1974-08-20
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Expires: 1992-10-03
Abstract
Abstract WHERE R IS AMINO OR BLOCKED AMINO, X IS -S-, -SO(A OR B) OR -S2-, AND AR IS A CARBOCYCLE OR A HETEROCYCLE SUBSTITUTED BY AT LEAST ONE ELECTRON WITHDRAWING SUBSTITUENT IN CONJUGATION WITH THE EXOCYCLIC -CH=CHDOUBLE BOND,AND SALTS AND ESTERS ARE USEFUL CHROMOGENIC AGENTS FOR THE DETECTION OF B-LACTAMASE ACTIVITY. TEST REAGENTS CONTAINING SUCH COMPOUNDS ARE ALSO DISCLOSED. 1,2-(-C(-COOH)=C(-CH=CH-AR)-CH2-X-),3-R-AZETIDIN-4-ONE CEPHALOSPORIN COMPOUNDS HAVING THE FORMULA
Inventors
- 👤 Callaghan C O
- 👤 S Kirby
- 👤 I Heath
- 👤 J Clark
- 👤 J Kennedy
- 👤 A Shingler
- 👤 N Weir
- 👤 A Long
- 👤 A Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:21
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/34; C12Q2334/00; G; G01; G01N; G01N2333/00; G01N2333/90; G01N2333/914; G01N2333/978; G01N2333/986; G01N2415/00; Y; Y10; Y10S; Y10S435/00; Y10S435/805
Claims Analysis
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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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |