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Patent US2940852A successfully refreshed from Google Patents.
US2940852A
Expired / Lapsed
US
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m, m'-dioxydiphenols as coupling components in diazotype intermediates of high opacity
Assignee: GAF Chemicals Corp
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Filing: 1957-02-19
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Granted: 1960-06-14
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Expires: 1977-02-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Clifford E Herrick
- 👤 Chester E Slimowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:09
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
LIGHT SENSITIVE DIAZOTYPE MATERIALS COMPRISING A BASE SENSITIZED WITH A LIGHT SENSITIVE DIAZONIUM COMPOUND, AND AS THE COUPLING COMPONENT, THE COMPOUND OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
25 words
LIGHT SENSITIVE DIAZOTYPE MATERIALS COMPRISING A BASE SENSITIZED WITH A LIGHT SENSITIVE DIAZONIUM COMPOUND, AND AS THE COUPLING COMPONENT, THE COMPOUND OF THE FOLLOWING FORMULA:
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |