Patent US2768052A successfully refreshed from Google Patents.
US2768052A
Expired / Lapsed
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Anthraquinone dye-cellulose acetate composition and process of making same
Assignee: EIDP Inc
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Filing: 1953-08-26
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Granted: 1956-10-23
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Expires: 1973-08-26
Abstract
No abstract record available.
Inventors
- 👤 Robert C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:01
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/54; C09B1/545; C09B1/503; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A CELLULOSE FIBER-DYE COMPOSITION COMPRISING CELLULOSE ACETATE DYED WITH 1-AMINO-2-ALKLXY-ETHOXY-4-HYDROXYANTHRAQUINONE, WHEREIN THE ALKOXY GROUP CONTAINS FROM 1 TO 2 CARBON ATOMS.
Claim 2
Dependent Claim
21 words
A CELLULOSE FIBER-DYE COMPOSITION COMPRISING CELLULOSE ACETATE DYED WITH 1-AMINO-2-ALKLXY-ETHOXY-4-HYDROXYANTHRAQUINONE, WHEREIN THE ALKOXY GROUP CONTAINS FROM 1 TO 2 CARBON ATOMS.
References Cited (Backward Citations)
US1964971A
Cited
FR927445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |