US2494906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyan component for diazotype color process
Assignee: GAF Chemicals Corp
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Filing: 1947-06-06
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Granted: 1950-01-17
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Expires: 1967-06-06
Abstract
No abstract record available.
Inventors
- 👤 Sam C Slifkin
- 👤 Thaddeus J Trojnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:00
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
LIGHT SENSITIVE DIAZOTYPE MATERIAL FOR USE IN PRODUCING A CYAN RECORD IN THE DIAZOTYPE COLOR PROCESS COMPRISING A TRANSPARENT BASE CARRYING AS A LIGHT SENSITIVE DIAZO COMPOUND A DIAZOTIZED P-PHENYLENE-DIAMINE IN WHICH ONE OF THE AMINO GROUPS IS DI-SUBSTITUTED BY MEMBERS SELECTED FROM THE CLASS CONSISTING OF ALKYL AND HYDROXYALKYL AND AS THE AZO COMPONENT A COMPOUND OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
61 words
LIGHT SENSITIVE DIAZOTYPE MATERIAL FOR USE IN PRODUCING A CYAN RECORD IN THE DIAZOTYPE COLOR PROCESS COMPRISING A TRANSPARENT BASE CARRYING AS A LIGHT SENSITIVE DIAZO COMPOUND A DIAZOTIZED P-PHENYLENE-DIAMINE IN WHICH ONE OF THE AMINO GROUPS IS DI-SUBSTITUTED BY MEMBERS SELECTED FROM THE CLASS CONSISTING OF ALKYL AND HYDROXYALKYL AND AS THE AZO COMPONENT A COMPOUND OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US1710455A
Cited
US2375366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |