US3256285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the pigment properties of substituted linear quinacridones
Assignee: Hoechst AG
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Filing: 1962-05-29
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Granted: 1966-06-14
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Expires: 1982-05-29
Abstract
No abstract record available.
Inventors
- 👤 Fuchs Otto
- 👤 Kirsch Aloys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:27
CPC Classifications
C; C09; C09B; C09B48/00; C09B67/00; C09B67/0001; C09B67/0014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A PROCESS FOR IMPROVING THE PIGMENT PROPERTIES OF LINEAR QUINACRIDONES HAVING THE FORMULA
Claim 2
Dependent Claim
13 words
A PROCESS FOR IMPROVING THE PIGMENT PROPERTIES OF LINEAR QUINACRIDONES HAVING THE FORMULA
References Cited (Backward Citations)
US3016384A
Cited
US3007930A
Cited
FR1233785A
Cited
US3006922A
Cited
US2982666A
Cited
US3020279A
Cited
US3074950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |