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US2807630A
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US
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Addition compounds of the anthraquinone series
Assignee: BASF Schweiz AG
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Filing: 1954-06-28
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Granted: 1957-09-24
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Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Jenny Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:29
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/56; C09B1/58; C09B1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2073589A
Cited
GB442607A
Cited
US2187819A
Cited
US2109464A
Cited
US2647124A
Cited
US2671113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |