US2946684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype copying processes
Assignee: Keuffel and Esser Co
•
Filing: 1959-06-10
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Granted: 1960-07-26
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Expires: 1979-06-10
Abstract
No abstract record available.
Inventors
- 👤 Sus Oskar
- 👤 Schlesinger Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:01
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/096; G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A DIAZOTYPE LIGHT SENSITIVE MATERIAL FOR THE PREPARATION OF INTERMEDIATE COPIES COMPRISING A LIGHT TRANSMITTING BASE MATERIAL COATED WITH A LIGHT SENSITIVE COMPOSITION WHICH WILL FORM AFTER EXPOSURE AND DEVELOPMENT A YELLOW TO GREENISH YELLOW IMAGE INCLUDING A LIGHT SENSITIVE DIAZO COMPOUND AND AN AZO DYE COUPLING COMPONENT OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
52 words
A DIAZOTYPE LIGHT SENSITIVE MATERIAL FOR THE PREPARATION OF INTERMEDIATE COPIES COMPRISING A LIGHT TRANSMITTING BASE MATERIAL COATED WITH A LIGHT SENSITIVE COMPOSITION WHICH WILL FORM AFTER EXPOSURE AND DEVELOPMENT A YELLOW TO GREENISH YELLOW IMAGE INCLUDING A LIGHT SENSITIVE DIAZO COMPOUND AND AN AZO DYE COUPLING COMPONENT 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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |