Patent US3408203A successfully refreshed from Google Patents.
US3408203A
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Diazotype reproduction materials containing an o-amino phenol as coupler
Assignee: Keuffel and Esser Co
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Filing: 1965-07-29
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Granted: 1968-10-29
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Expires: 1985-07-29
Abstract
No abstract record available.
Inventors
- 👤 Sus Oskar
- 👤 Munder Johannes
- 👤 Schafer Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:27
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/28; C07C275/32; C07C275/34; C07C335/00; C07C335/04; C07C335/16; C07C335/18; G; G03; G03C; G03C1/00; G03C1/52; G03C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A TWO-COMPONENT DIAZOTYPE MATERIAL WHICH COMPRISES: A SUPPORT; AND A LIGHT-SENSITIVE COATING ON SAID SUPPORT, SAID COATING COMPRISING A DIAZONIUM SALT AND A SUBSTITUTION DERIVATIVE OF ORTHO-AMINOPHENOL AS THE ONLY AZO COMPONENT, SAID SUBSTITUTION DERIVATIVE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
39 words
A TWO-COMPONENT DIAZOTYPE MATERIAL WHICH COMPRISES: A SUPPORT; AND A LIGHT-SENSITIVE COATING ON SAID SUPPORT, SAID COATING COMPRISING A DIAZONIUM SALT AND A SUBSTITUTION DERIVATIVE OF ORTHO-AMINOPHENOL AS THE ONLY AZO COMPONENT, SAID SUBSTITUTION DERIVATIVE HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2432549A
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US2485122A
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US2496240A
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US2727820A
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US2755185A
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US3007795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |