Patent US3019119A successfully refreshed from Google Patents.
US3019119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose acetate spinning solutions
Assignee: EIDP Inc
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Filing: 1958-08-29
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Granted: 1962-01-30
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Expires: 1978-08-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry Allen Hoffman
- 👤 Sherbeck Leander Adair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:06
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST 60% BY WEIGHT OF CELLULOSE TRIACETATE CONTAINING 2.7 TO 3.0 ACETYL GROUPS PER GLUCOSE UNIT AND AS MINOR COMPONENTS IN AMOUNTS OF FROM 5-25% EACH, A POLYMERIC SUBSTANCE CONTAINING AS PART OF THE POLYMER STRUCTURE SULFONIC ACID GROUPS AVAILABLE FOR REACTION WITH BASIC DYESTUFFS AND A CELLULOSE ACETATE CONTAINING FROM ABOUT 2.0-2.3 ACETYL GROUPS PER GLUCOSE UNIT, THERE BEING AT LEAST ABOUT 10 MILLIEQUIVALENTS OF SULFONIC ACID GROUPS PRESENT PER KILOGRAM OF FINAL COMPOSITION.
Claim 2
Dependent Claim
81 words
A COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST 60% BY WEIGHT OF CELLULOSE TRIACETATE CONTAINING 2.7 TO 3.0 ACETYL GROUPS PER GLUCOSE UNIT AND AS MINOR COMPONENTS IN AMOUNTS OF FROM 5-25% EACH, A POLYMERIC SUBSTANCE CONTAINING AS PART OF THE POLYMER STRUCTURE SULFONIC ACID GROUPS AVAILABLE FOR REACTION WITH BASIC DYESTUFFS AND A CELLULOSE ACETATE CONTAINING FROM ABOUT 2.0-2.3 ACETYL GROUPS PER GLUCOSE UNIT, THERE BEING AT LEAST ABOUT 10 MILLIEQUIVALENTS OF SULFONIC ACID GROUPS PRESENT PER KILOGRAM OF FINAL COMPOSITION.
References Cited (Backward Citations)
US2849330A
Cited
US2880106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |