US2435307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-phthalocyanines containing halo-methyl groups and process of preparing same
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1946-03-12
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Granted: 1948-02-03
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Expires: 1966-03-12
Abstract
No abstract record available.
Inventors
- 👤 Haddock Norman Hulton
- 👤 Wood Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:09
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB496683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-02 | 1951-08-04 | 1952-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-02 | 1955-08-04 | 1956-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-02 | 1959-08-04 | 1960-02-03 | $7700.00 | Window Closed / Lapsed |