Patent US2662906A successfully refreshed from Google Patents.
US2662906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chloramphenicol esters and method for obtaining same
Assignee: Parke Davis and Co LLC
•
Filing: 1951-03-03
•
Granted: 1953-12-15
•
Expires: 1971-03-03
Abstract
No abstract record available.
Inventors
- 👤 William H Edgerton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:15
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A COMPOUND OF THE FORMULA, WHERE R IS AN ALIPHATIC HYDROCARBON RADICAL CONTAINING 7 TO 19 CARBON ATOMS INCLUSIVE.
Claim 2
Dependent Claim
19 words
A COMPOUND OF THE FORMULA, WHERE R IS AN ALIPHATIC HYDROCARBON RADICAL CONTAINING 7 TO 19 CARBON ATOMS INCLUSIVE.
References Cited (Backward Citations)
US2513346A
Cited
US2514376A
Cited
US2538765A
Cited
US2586661A
Cited
US2543269A
Cited
US2545094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |