Patent US3207755A successfully refreshed from Google Patents.
US3207755A
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Transformation products of cephalosporin c and derivatives thereof
Assignee: National Research Development Corp UK
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Filing: 1960-07-26
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Granted: 1965-09-21
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Expires: 1980-07-26
Abstract
No abstract record available.
Inventors
- 👤 Abraham Edward Penley
- 👤 Newton Guy Geoffrey Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:07
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/54; A61K31/542; A61K31/545; C07D501/18; C07D501/26; C07D501/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
16 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE NUCLEUS OF CEPHALOSPORIN C HAVING THE STRUCTURE
Claim 2
Dependent Claim
16 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE NUCLEUS OF CEPHALOSPORIN C HAVING THE STRUCTURE
Claim 3
Dependent Claim
16 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE NUCLEUS OF CEPHALOSPORIN CC HAVING THE STRUCTURE
Claim 4
Dependent Claim
16 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE NUCLEUS OF CEPHALOSPORIN CC HAVING THE STRUCTURE
Claim 5
Dependent Claim
18 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE NUCLEUS OF A CEPHALOSPORIN CA COMPOUND HAVING THE STRUCTURE
Claim 6
Dependent Claim
18 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE NUCLEUS OF A CEPHALOSPORIN CA COMPOUND HAVING THE STRUCTURE
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |