US3029284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-dealkylation of carboxamido-nu-alkyltetracycline and its analogs
Assignee: Pfizer Inc
•
Filing: 1960-09-14
•
Granted: 1962-04-10
•
Expires: 1980-09-14
Abstract
No abstract record available.
Inventors
- 👤 Philip N Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:25
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE PROCESS WHICH COMPRISES CONTACTING CARBOXAMIDO N-DEOXYTETRACYCLINE OF THE FORMULA:
Claim 2
Dependent Claim
10 words
THE PROCESS WHICH COMPRISES CONTACTING CARBOXAMIDO N-DEOXYTETRACYCLINE OF THE FORMULA:
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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |