Patent US3226384A successfully refreshed from Google Patents.
US3226384A
Expired / Lapsed
US
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Cephalosporin ca derivatives
Assignee: National Research Development Corp UK
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Filing: 1963-01-25
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Granted: 1965-12-28
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Expires: 1983-01-25
Abstract
No abstract record available.
Inventors
- 👤 Abraham Edward Penley
- 👤 Newton Guy Geoffrey Frederick
- 👤 Hale Clifford William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:14
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/38; C07D501/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
61 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CEPHALOSPORIN CA (TERTIARY BASE) WHEREIN THE BASE IS A HETEROCYCLIC, WEAK, TERTIARY BASE HAVING A CYCLIC STRUCTURE CONTAINING AT LEAST ONE NITROGEN HETEROATOM, LINKED TO CH2 VIA A NITROGEN HETEROATOM, PHARMACEUTICALLY ACCEPTABLE NON-TOXIC SALTS THEREOF WITH ORGANIC AND INORGANIC ACIDS, AND PHARMACEUTICALLY ACCEPTABLE NON-TOXIC ALKALI AND ALKALINE EARTH METAL SALTS OF SAID BASE.
Claim 2
Dependent Claim
61 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CEPHALOSPORIN CA (TERTIARY BASE) WHEREIN THE BASE IS A HETEROCYCLIC, WEAK, TERTIARY BASE HAVING A CYCLIC STRUCTURE CONTAINING AT LEAST ONE NITROGEN HETEROATOM, LINKED TO CH2 VIA A NITROGEN HETEROATOM, PHARMACEUTICALLY ACCEPTABLE NON-TOXIC SALTS THEREOF WITH ORGANIC AND INORGANIC ACIDS, AND PHARMACEUTICALLY ACCEPTABLE NON-TOXIC ALKALI AND ALKALINE EARTH METAL SALTS OF SAID BASE.
Claim 3
Dependent Claim
16 words
THE COMPOUND CEPHALOSPORIN CA (SULPHADIAZINE) WHEREIN THE SULPHADIAZINE IS LINKED TO CH2 VIA A NITROGEN HETEROATOM.
Claim 4
Dependent Claim
16 words
THE COMPOUND CEPHALOSPORIN CA (SULPHADIAZINE) WHEREIN THE SULPHADIAZINE IS LINKED TO CH2 VIA A NITROGEN HETEROATOM.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |