US3300512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of metal-containing phthalocyanines
Assignee: Bayer Corp
•
Filing: 1965-08-12
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Granted: 1967-01-24
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Expires: 1985-08-12
Abstract
No abstract record available.
Inventors
- 👤 Gerson Herman
- 👤 William E Bachman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:31
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN A PROCESS FOR PREPARING A METAL PHTHALOCYANINE BY HEATING A REACTION MIXTURE CONTAINING A PHTHALOCYANINE INTERMEDIATE, A NITROGEN DONOR, A METAL DONOR AND A CATALYST, THE IMPROVEMENT WHICH COMPRISES INCORPORATING SULFUR TRIOXIDE IN THE REACTION MIXTURE IN AMOUNT AT LEAST SUFFICIENT TO IMPROVE THE YIELD OF METAL PHTHALOCYANINE AS COMPARED WITH THE YIELD OBTAINED FROM THE REACTION MIXTURE WITHOUT THE SULFUR TRIOXIDE.
Claim 2
Dependent Claim
63 words
IN A PROCESS FOR PREPARING A METAL PHTHALOCYANINE BY HEATING A REACTION MIXTURE CONTAINING A PHTHALOCYANINE INTERMEDIATE, A NITROGEN DONOR, A METAL DONOR AND A CATALYST, THE IMPROVEMENT WHICH COMPRISES INCORPORATING SULFUR TRIOXIDE IN THE REACTION MIXTURE IN AMOUNT AT LEAST SUFFICIENT TO IMPROVE THE YIELD OF METAL PHTHALOCYANINE AS COMPARED WITH THE YIELD OBTAINED FROM THE REACTION MIXTURE WITHOUT THE SULFUR TRIOXIDE.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |