Patent US3028240A successfully refreshed from Google Patents.
US3028240A
Expired / Lapsed
US
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Light sensitive diazotype materials
Assignee: Keuffel and Esser Co
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Filing: 1959-01-15
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Granted: 1962-04-03
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Expires: 1979-01-15
Abstract
No abstract record available.
Inventors
- 👤 Werner Georg
- 👤 Poser Gottlieb Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:09
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A LIGHT SENSITIVE DIAZOTYPE MATERIAL OF THE SINGLE COMPONENT TYPE COMPRISING A BASE MATERIAL COATED WITH A LIGHT SENSITIVE COMPOSITION INCLUDING A LIGHT SENSITIVE DIAZO COMPOUND FORMED FROM A P-PHENYLENEDIAMINE HAVING A GENERAL FORMULA SELECTED FROM THE GROUP CONSISTING OF:
Claim 2
Dependent Claim
40 words
A LIGHT SENSITIVE DIAZOTYPE MATERIAL OF THE SINGLE COMPONENT TYPE COMPRISING A BASE MATERIAL COATED WITH A LIGHT SENSITIVE COMPOSITION INCLUDING A LIGHT SENSITIVE DIAZO COMPOUND FORMED FROM A P-PHENYLENEDIAMINE HAVING A GENERAL FORMULA SELECTED FROM THE GROUP CONSISTING OF:
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) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |