US3349097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble phthalocyanine dyestuffs and process for preparing them
Assignee: Hoechst AG
•
Filing: 1965-03-26
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Granted: 1967-10-24
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Expires: 1985-03-26
Abstract
No abstract record available.
Inventors
- 👤 Kuhne Rudolf
- 👤 Meininger Fritz
- 👤 Noll Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:54
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/523; C09B62/525; C09B62/4401; C09B62/4403; C09B62/537
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A WATER-SOLUBLE PHTHALOCYANINE DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
7 words
A WATER-SOLUBLE PHTHALOCYANINE DYESTUFF OF THE FORMULA
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |