US2957004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bz-phenyl metal phthalocyanine precursors
Assignee: EIDP Inc
•
Filing: 1957-10-30
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Granted: 1960-10-18
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Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Melvin A Perkins
- 👤 Myron S Whelen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:42
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/06; C09B47/073; C09B47/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A METAL PHTHALOCYANINE PRECURSOR OF THE STRUCTURE
Claim 2
Dependent Claim
7 words
A METAL PHTHALOCYANINE PRECURSOR OF THE STRUCTURE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |