Patent US3154532A successfully refreshed from Google Patents.
US3154532A
Expired / Lapsed
US
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New water-soluble azo dyes containing a quinazoline radical
Assignee: BASF SE
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Filing: 1962-06-12
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Granted: 1964-10-27
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Weidinger Hans
- 👤 Wellenreuther Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:28
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/0025; C09B29/0029; C09B29/0051; C09B29/06; C09B29/08; C09B29/0805; C09B29/0807; C09B29/0809; C09B29/0811
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A WATER-SOLUBLE AZO DYE OF THE FORMULA:
Claim 2
Dependent Claim
7 words
A WATER-SOLUBLE AZO DYE OF THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |