Patent US3498791A successfully refreshed from Google Patents.
US3498791A
Expired / Lapsed
US
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Two-component diazotype material
Assignee: Keuffel and Esser Co
•
Filing: 1966-10-27
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Granted: 1970-03-03
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Herbert Rauhut
- 👤 Roland Moraw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:57
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/06; G; G03; G03C; G03C1/00; G03C1/52; G03C1/61; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2432549A
Cited
GB643042A
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US2639990A
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US3069268A
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US3113025A
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US3248220A
Cited
US3378389A
Cited
US3365296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |