US2580190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyestuffs of the anthraquinone series
Assignee: Sandoz AG
•
Filing: 1950-05-23
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Granted: 1951-12-25
•
Expires: 1970-05-23
Abstract
No abstract record available.
Inventors
- 👤 Peter Albin
- 👤 Gunthart Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:12
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A DYESTUFF OF THE ANTHRAQUINONE SERIES CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
10 words
A DYESTUFF OF THE ANTHRAQUINONE SERIES CORRESPONDING TO THE FORMULA
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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |