Patent US3265442A successfully refreshed from Google Patents.
Patent US2662897A successfully refreshed from Google Patents.
US2662897A
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Reversible solvent-soluble derivatives of phthalocyanine compounds
Assignee: EIDP Inc
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Filing: 1951-10-19
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Granted: 1953-12-15
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Expires: 1971-10-19
Abstract
No abstract record available.
Inventors
- 👤 Pedersen Charles John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:32
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/30; C09B47/08; Y; Y10; Y10S; Y10S8/00; Y10S8/938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
COMPOUNDS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
5 words
COMPOUNDS OF THE GENERAL FORMULA
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) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |