US3294542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive diazo compositions
Assignee: Keuffel and Esser Co
•
Filing: 1964-12-21
•
Granted: 1966-12-27
•
Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Sus Oskar
- 👤 Schafer Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:36
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/18; G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
A DIAZO COMPOSITION COMPRISING A UNILATERALLY DIAZOTIZED PARAPHENYLENE DIAMINE SALT AND A 2-(3'',5''PHENYL)-BENZIMIDAZOLE SALT.
Claim 2
Dependent Claim
14 words
A DIAZO COMPOSITION COMPRISING A UNILATERALLY DIAZOTIZED PARAPHENYLENE DIAMINE SALT AND A 2-(3'',5''PHENYL)-BENZIMIDAZOLE SALT.
Claim 3
Dependent Claim
21 words
A DIAZO COMPOSITION COMPRISING A UNILATERALLY DIAZOTIZED PARAPHENYLENE DIAMINE SALT AND A SALT OF A 2-(3'',5''DIHYDROXYPHENYL)- BENZIMIDAZOLE HAVING THE GENERAL FORMULA:
Claim 4
Dependent Claim
21 words
A DIAZO COMPOSITION COMPRISING A UNILATERALLY DIAZOTIZED PARAPHENYLENE DIAMINE SALT AND A SALT OF A 2-(3'',5''DIHYDROXYPHENYL)- BENZIMIDAZOLE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |