US2937166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo-dyestuffs insoluble in water
Assignee: Hoechst AG
•
Filing: 1958-07-01
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Granted: 1960-05-17
•
Expires: 1978-07-01
Abstract
No abstract record available.
Inventors
- 👤 Kracker Herbert
- 👤 Albert Hans
- 👤 Staab Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:36
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/10; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
AZO-DYESTUFFS INSOLUBLE IN WATER CORRESPONDING TO THE FOLLOWING GENERAL FORMULA
Claim 2
Dependent Claim
10 words
AZO-DYESTUFFS INSOLUBLE IN WATER CORRESPONDING TO THE FOLLOWING GENERAL FORMULA
References Cited (Backward Citations)
DE832179C
Cited
US2783225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |