Patent US2844598A successfully refreshed from Google Patents.
US2844598A
Expired / Lapsed
US
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Disperse dyestuffs of the anthraquinone series
Assignee: Sandoz AG
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Filing: 1956-12-21
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Granted: 1958-07-22
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Expires: 1976-12-21
Abstract
No abstract record available.
Inventors
- 👤 Gunthard Jacqes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:38
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/54; C09B1/545; C09B1/503
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A DISPERSE DYESTUFF OF THE ANTHRAQUINONE SERIES WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
12 words
A DISPERSE DYESTUFF OF THE ANTHRAQUINONE SERIES WHICH CORRESPONDS 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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |