Patent US2848462A successfully refreshed from Google Patents.
US2848462A
Expired / Lapsed
US
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Dyestuffs of the anthraquinone series
Assignee: Saul and Co
•
Filing: 1955-03-30
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Granted: 1958-08-19
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Expires: 1975-03-30
Abstract
No abstract record available.
Inventors
- 👤 Gutzwiller-Markees Jenny
- 👤 Brunner Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:09
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; C09B1/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN ANTHRAQUINONE DYESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
8 words
AN ANTHRAQUINONE DYESTUFF 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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |