US2555973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated derivatives of the naphthoquinone-imine series and a process of making same
Assignee: Sandoz AG
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Filing: 1949-06-06
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Granted: 1951-06-05
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Expires: 1969-06-06
Abstract
No abstract record available.
Inventors
- 👤 Kartaschoff Valentin
- 👤 Merian Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:31
CPC Classifications
C; C09; C09B; C09B13/00; C09B13/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
THE HALOGENATED NAPTHOQUINONE-IMINES OF THE FORMULA
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |