US2709672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of chlortetracycline
Assignee: Wyeth Holdings LLC
•
Filing: 1952-04-04
•
Granted: 1955-05-31
•
Expires: 1972-04-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Milton Andrew Petty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:49
CPC Classifications
C; C07; C07C; C07C233/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/889
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A PROCESS FOR THE PRODUCTION OF CHLORTETRACYCLINE COMPRISING PREPARING A STERILE NUTRIENT MEDIUM COMPRISING:
Claim 2
Dependent Claim
14 words
A PROCESS FOR THE PRODUCTION OF CHLORTETRACYCLINE COMPRISING PREPARING A STERILE NUTRIENT MEDIUM COMPRISING:
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) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |