Patent US2531004A successfully refreshed from Google Patents.
US2531004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetonitriles as azo components in diazotypes
Assignee: GAF Chemicals Corp
•
Filing: 1947-11-26
•
Granted: 1950-11-21
•
Expires: 1967-11-26
Abstract
No abstract record available.
Inventors
- 👤 Slifkin Sam Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:12
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
IN THE PROCESS OF PREPARING DIAZOTYPE COPIES, THE STEP WHICH COMPRISES COUPLING THE RESIDUAL LIGHT SENSITIVE DIAZO COMPOUND, CONTAINED IN A LIGHT SENSITIVE DIAZOTYPE LAYER AFTER EXPOSURE THEREOF TO LIGHT IN PREDETERMINED PATTERN, WITH AN AZO COUPLING COMPONENT HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
43 words
IN THE PROCESS OF PREPARING DIAZOTYPE COPIES, THE STEP WHICH COMPRISES COUPLING THE RESIDUAL LIGHT SENSITIVE DIAZO COMPOUND, CONTAINED IN A LIGHT SENSITIVE DIAZOTYPE LAYER AFTER EXPOSURE THEREOF TO LIGHT IN PREDETERMINED PATTERN, WITH AN AZO COUPLING COMPONENT HAVING THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US1943377A
Cited
US1989065A
Cited
US2113330A
Cited
US2108602A
Cited
US2115394A
Cited
US2312040A
Cited
US2217189A
Cited
US2334495A
Cited
US2380809A
Cited
US2453661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |