Patent US2773071A successfully refreshed from Google Patents.
US2773071A
Expired / Lapsed
US
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Anthraquinone dyes
Assignee: Interchemical Corp
•
Filing: 1954-01-26
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Granted: 1956-12-04
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Expires: 1974-01-26
Abstract
No abstract record available.
Inventors
- 👤 Roy A Pizzarello
- 👤 Gutoff Boris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:24
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/54; C09B1/547; C09B1/503
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A NEW RED DYE HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
8 words
A NEW RED DYE HAVING THE STRUCTURAL 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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |