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US2559787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored cellulose esters and ethers
Assignee: Celanese Corp
•
Filing: 1946-07-10
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Granted: 1951-07-10
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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 05:40
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.
References Cited (Backward Citations)
US1074429A
Cited
US1903600A
Cited
US2086591A
Cited
US2112403A
Cited
US2145580A
Cited
US2083308A
Cited
US2111300A
Cited
US2101323A
Cited
US2105519A
Cited
US2193151A
Cited
GB501913A
Cited
US2241251A
Cited
US2294968A
Cited
US2288531A
Cited
US2393652A
Cited
US2420008A
Cited
US2388663A
Cited
US2347704A
Cited
US2420453A
Cited
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 |