Patent US3287147A successfully refreshed from Google Patents.
US3287147A
Expired / Lapsed
US
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Process for manufacture of quinacridone pigment compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1963-06-24
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Granted: 1966-11-22
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Wilkinson Donald Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:58
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0033; C09B67/0034; C09B67/0036; C09B48/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS FOR THE MANUFACTURE OF A PIGMENT COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST 2 DIFFERENT LINEAR QUINACRIDONES OF THE FORMULA
Claim 2
Dependent Claim
21 words
A PROCESS FOR THE MANUFACTURE OF A PIGMENT COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST 2 DIFFERENT LINEAR QUINACRIDONES OF THE FORMULA
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |