Patent US5784091A successfully refreshed from Google Patents.
US3139433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-tetracycline derivatives of piperazine
Assignee: Chinoin Private Co Ltd
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Filing: 1962-03-28
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Granted: 1964-06-30
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Expires: 1982-03-28
Abstract
No abstract record available.
Inventors
- 👤 Kollar Gyula
- 👤 Sipos Lajos
- 👤 Pato Gabor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:43
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
THE WATER SOLUBLE TETRACYCLINE DERIVATIVES OF THE FORMULA
Claim 2
Dependent Claim
8 words
THE WATER SOLUBLE TETRACYCLINE DERIVATIVES OF THE FORMULA
References Cited (Backward Citations)
DE1088481B
Cited
US2997471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |