US2456274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aryl thio-ethers of metal-containing phthalocyanines and process for producing same
Assignee: Sandoz AG
•
Filing: 1945-03-15
•
Granted: 1948-12-14
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Expires: 1965-03-15
Abstract
No abstract record available.
Inventors
- 👤 Gutzwiller Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH203432A
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CH205538A
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GB492177A
Cited
US2285359A
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CH217984A
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US2290906A
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GB541146A
Cited
GB544953A
Cited
US2342662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |