US3625936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azophthalocyanine dyestuffs and process for preparing them
Assignee: Hoechst AG
•
Filing: 1968-08-07
•
Granted: 1971-12-07
•
Expires: 1988-08-07
Abstract
Abstract D R A W I N G
Inventors
- 👤 Fritz Meininger
- 👤 Hartmut Springer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:01
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/485
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
5 words
The dyestuff of the formula
Claim 2
Dependent Claim
5 words
The dyestuff of the formula
Claim 3
Dependent Claim
5 words
The dyestuff of the formula
Claim 4
Dependent Claim
5 words
The dyestuff of the formula
Claim 5
Dependent Claim
5 words
The dyestuff of the formula
References Cited (Backward Citations)
US3133050A
Cited
US3278549A
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US3278516A
Cited
US3360524A
Cited
US3360509A
Cited
US3360505A
Cited
US3445449A
Cited
US3489741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |