US2914538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent soluble phthalocyanine dyes
Assignee: GAF Chemicals Corp
•
Filing: 1957-01-25
•
Granted: 1959-11-24
•
Expires: 1977-01-25
Abstract
No abstract record available.
Inventors
- 👤 David I Randall
- 👤 Wowk Anatole
- 👤 Taras John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:25
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; Y; Y10; Y10S; Y10S8/00; Y10S8/938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A PROCESS FOR OXIDIZING A PHTHALOCYANINE TO A LEUCO PHTHALOCYANINE, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE OXIDATION BY REACTING A PHTHALOCYANINE WITH AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF N-BROMOACETAMIDE, N-DIBROMOACETAMIDE, N- BROMOPROPOINAMIDE, N-DIBROMOPROPIONAMIDE,N-- BROMOSUCCINIMIDE, TRICHLOROISOCYANURIC ACID, N-BROMOPHTHALIMIDE, I,3 - DICHLORO - 5,5 -DIMETHYLHYDANTOIN, AND 1,3 - DI BROMO - 5,5 - DIMETHYLHYDANTOIN.
Claim 2
Dependent Claim
56 words
IN A PROCESS FOR OXIDIZING A PHTHALOCYANINE TO A LEUCO PHTHALOCYANINE, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE OXIDATION BY REACTING A PHTHALOCYANINE WITH AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF N-BROMOACETAMIDE, N-DIBROMOACETAMIDE, N- BROMOPROPOINAMIDE, N-DIBROMOPROPIONAMIDE,N-- BROMOSUCCINIMIDE, TRICHLOROISOCYANURIC ACID, N-BROMOPHTHALIMIDE, I,3 - DICHLORO - 5,5 -DIMETHYLHYDANTOIN, AND 1,3 - DI BROMO - 5,5 - DIMETHYLHYDANTOIN.
References Cited (Backward Citations)
US2276175A
Cited
US2662895A
Cited
US2662896A
Cited
US2681347A
Cited
US2772283A
Cited
US2782207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |