US2559787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored cellulose esters and ethers
Assignee: Celanese Corp
•
Filing: 1946-07-10
•
Granted: 1951-07-10
•
Expires: 1966-07-10
Abstract
No abstract record available.
Inventors
- 👤 Olpin Henry Charles
- 👤 House Kenneth Ronald
- 👤 Wright John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:04
CPC Classifications
C; C09; C09B; C09B69/00; D; D01; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
FIBER-FORMING MATERIALS, SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTER AND CELLULOSE ETHERS, SOLUBLE IN ORGANIC LIQUIDS, SAID FIBER-FORMING MATERIALS BEING COLORED WITH A DYE WHICH CONTAINS TWO MONOVALENT ALIPHATIC HYDROCARBON RADICALS EACH OF WHICH CONTAINS FROM 8 TO 18 CARBON ATOMS UNITED BY CARBON TO CARBON LINKAGES, THE CHROMOPHORIC NUCLEUS OF SAID DYE BEING FREE FROM SULPHONIC ACID AND CARBOXYLIC ACID GROUPS AND BEING SELECTED FROM THE GROUP CONSISTING OF THE ANTHRAQUINONE NUCLEUS, THE AZO-BENZENE NUCLEUS AND THE NITRO-DIPHENYLAMINE NUCLEUS.
Claim 2
Dependent Claim
81 words
FIBER-FORMING MATERIALS, SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTER AND CELLULOSE ETHERS, SOLUBLE IN ORGANIC LIQUIDS, SAID FIBER-FORMING MATERIALS BEING COLORED WITH A DYE WHICH CONTAINS TWO MONOVALENT ALIPHATIC HYDROCARBON RADICALS EACH OF WHICH CONTAINS FROM 8 TO 18 CARBON ATOMS UNITED BY CARBON TO CARBON LINKAGES, THE CHROMOPHORIC NUCLEUS OF SAID DYE BEING FREE FROM SULPHONIC ACID AND CARBOXYLIC ACID GROUPS AND BEING SELECTED FROM THE GROUP CONSISTING OF THE ANTHRAQUINONE NUCLEUS, THE AZO-BENZENE NUCLEUS AND THE NITRO-DIPHENYLAMINE NUCLEUS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |