US3268548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble phthalocyanine dyestuffs
Assignee: Hoechst AG
•
Filing: 1961-02-28
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Granted: 1966-08-23
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Expires: 1981-02-28
Abstract
No abstract record available.
Inventors
- 👤 Hayna Johannes
- 👤 Springer Hartmut
- 👤 Schinzel Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:34
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B62/517
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |