Patent US3006830A successfully refreshed from Google Patents.
US3006830A
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Method for improving the dyeability of fiber-forming cellulose esters
Assignee: Dow Chemical Co
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Filing: 1957-05-31
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Granted: 1961-10-31
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Expires: 1977-05-31
Abstract
No abstract record available.
Inventors
- 👤 Lamar C Cloninger
- 👤 Frederick M Arnesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:57
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/22; D06P5/225; D06M; D06M14/00; D06M14/18; D06M14/20; D06M14/22; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD FOR IMPROVING THE RECEPTIVITY TO DIRECT AND ACID TYPE DYESTUFFS OF SHAPED ARTICLES OF FIBER-FORMING CELLULOSE ESTERS WHICH COMPRISES THOROUGHLY IMPREGNANTING AT LEAST THE SURFACE OF THE SHAPED ARTICLE WITH BETWEEN ABOUT 1 AND ABOUT 75 WEIGHT PRECENT, BASED ON THE WEIGHT OF THE CELLULOSE ESTER SUBSTRATE, OF A SULFONATED ALKENYL AROMATIC MONOMER COMPOUND OF THE STRUCTURE:
Claim 2
Independent Claim
59 words
A METHOD FOR IMPROVING THE RECEPTIVITY TO DIRECT AND ACID TYPE DYESTUFFS OF SHAPED ARTICLES OF FIBER-FORMING CELLULOSE ESTERS WHICH COMPRISES THOROUGHLY IMPREGNANTING AT LEAST THE SURFACE OF THE SHAPED ARTICLE WITH BETWEEN ABOUT 1 AND ABOUT 75 WEIGHT PRECENT, BASED ON THE WEIGHT OF THE CELLULOSE ESTER SUBSTRATE, OF A SULFONATED ALKENYL AROMATIC MONOMER COMPOUND OF THE STRUCTURE:
References Cited (Backward Citations)
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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) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |