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US3297712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of metal-free phthalocyanines
Assignee: BASF SE
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Filing: 1964-05-22
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Granted: 1967-01-10
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Expires: 1984-05-22
Abstract
No abstract record available.
Inventors
- 👤 Mueller Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:09
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06; C09B47/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR THE PRODUCTION OF METAL-FREE PHTHALOCYANINES WHICH COMPRISES HEATING AN AROMATIC DINITRILE SELECTED FROM THE GROUP CONSISTING OF PHTHALODINITRILE, CHLOROPHTHALODINITRILE, PHENYLPHTHALODINITRILE, NAPHTHALENE-ORTHO-DINITRILE AND ANTHRACENE-ORTHO-DINITRILE IN THE PRESENCE OF HYDROGEN UNDER A PRESSURE OF 50 TO 400 ATMOSPHERES GAGE AT TEMPERATURES OF FROM 100* TO 500*C.
Claim 2
Dependent Claim
47 words
A PROCESS FOR THE PRODUCTION OF METAL-FREE PHTHALOCYANINES WHICH COMPRISES HEATING AN AROMATIC DINITRILE SELECTED FROM THE GROUP CONSISTING OF PHTHALODINITRILE, CHLOROPHTHALODINITRILE, PHENYLPHTHALODINITRILE, NAPHTHALENE-ORTHO-DINITRILE AND ANTHRACENE-ORTHO-DINITRILE IN THE PRESENCE OF HYDROGEN UNDER A PRESSURE OF 50 TO 400 ATMOSPHERES GAGE AT TEMPERATURES OF FROM 100* TO 500*C.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |