Patent NL20900C successfully refreshed from Google Patents.
Patent US3281245A successfully refreshed from Google Patents.
US3281245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype material
Assignee: Keuffel and Esser Co
•
Filing: 1963-03-07
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Granted: 1966-10-25
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Expires: 1983-03-07
Abstract
No abstract record available.
Inventors
- 👤 Werner Georg
- 👤 Poser Gottlieb Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:41
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/096; C07D295/12; C07D295/135; G; G03; G03C; G03C1/00; G03C1/52; G03C1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A DIAZOTYPE MATERIAL HAVING IMPROVED LIGHT-SENSITIVITY, HEAT-STABILITY, AND STORAGE LIFE COMPRISING A SUPPORT AND A LIGHT-SENSITIVE LAYER COATED ON SAID SUPPORT, SAID LAYER COMPRISING A DIAZONIUM SALT HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
31 words
A DIAZOTYPE MATERIAL HAVING IMPROVED LIGHT-SENSITIVITY, HEAT-STABILITY, AND STORAGE LIFE COMPRISING A SUPPORT AND A LIGHT-SENSITIVE LAYER COATED ON SAID SUPPORT, SAID LAYER COMPRISING A DIAZONIUM SALT HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2851452A
Cited
US2350843A
Cited
US3117954A
Cited
US2948613A
Cited
GB853020A
Cited
US3028240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |