US3711508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalocyanine dyestuffs
Assignee: Bayer AG
•
Filing: 1970-05-28
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Granted: 1973-01-16
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Expires: 1990-05-28
Abstract
Abstract PHTHALOCYANINE DYESTUFFS OF FORMULA PC-(3)(-SO3H)P(-SO2-NH-CH3)Q(-SO2-NH2)R WHEREIN PC DENOTES THE RESIDUE OF A COPPER OR NICKEL PHTHALOCYANINE, P DENOTES A NUMBER FROM 1.0 TO 1.9, Q DENOTES A NUMBER FRON 0.9 TO 1.2 AND R IS A NUMBER FROM 0.5 TO 1.0, WITH Q, P AND R REPRESENTING STSTISTICAL AVERAGE VALUES, THE SUM OF WHICH IS 2.9 TO 3.3 AND THEIR USE FOR DYEING AND PRINTING OF CELLULOSE CONTAIN ING MATERIALS. THE NEW DYESTUFFS ARE DISTINGUISHED BY EXCELLENT SOLUBILITY IN WATER AND VERY GOOD AFFINITY FOR COTTON AND ESPECIALLY FOR VISCOSE RAYON.
Inventors
- 👤 M Groll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:09
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/24; C09B47/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |