Patent US2967752A successfully refreshed from Google Patents.
US2967752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blue disperse dyestuffs of the anthraquinone series
Assignee: Sandoz AG
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Filing: 1959-05-18
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Granted: 1961-01-10
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Expires: 1979-05-18
Abstract
No abstract record available.
Inventors
- 👤 Bucheler Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:30
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/503
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A DISPERSE DYESTUFF OF THE ANTHRAQUINONE SERIES OF THE FORMULA:
Claim 2
Dependent Claim
10 words
A DISPERSE DYESTUFF OF THE ANTHRAQUINONE SERIES OF THE FORMULA:
References Cited (Backward Citations)
US2060186A
Cited
FR815697A
Cited
DE727387C
Cited
US2342191A
Cited
US2485197A
Cited
CH260551A
Cited
US2506020A
Cited
US2894800A
Cited
US2823212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |