Patent US2970029A successfully refreshed from Google Patents.
US2970029A
Expired / Lapsed
US
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Mixture of water-insoluble disazo dyestuffs
Assignee: Hoechst AG
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Filing: 1958-12-01
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Granted: 1961-01-31
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Expires: 1978-12-01
Abstract
No abstract record available.
Inventors
- 👤 Kracker Herbert
- 👤 Albert Hans
- 👤 Thaler Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:54
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/06; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
WATER-INSOLUBLE AZO-DYESTUFFS CONSISTING OF A MIXTURE OF AZO-DYESTUFFS WHICH CORRESPOND TO THE FOLLOWING TWO FORMULAE:
Claim 2
Dependent Claim
15 words
WATER-INSOLUBLE AZO-DYESTUFFS CONSISTING OF A MIXTURE OF AZO-DYESTUFFS WHICH CORRESPOND TO THE FOLLOWING TWO FORMULAE:
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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |