Patent US2849330A successfully refreshed from Google Patents.
US2849330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose derivatives
Assignee: EIDP Inc
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Filing: 1955-06-01
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Granted: 1958-08-26
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Expires: 1975-06-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry A Hoffman
- 👤 William K Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:33
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; Y; Y10; Y10S; Y10S8/00; Y10S8/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A COMPOSITION COMPRISING, AS THE MAJOR COMPONENT, A CELLULOSE DERIVATIVE SOLUBLE IN AN ORGANIC SOLVENT AND, AS A MINOR COMPONENT, AN ORGAIC POLMERIC SUBSTANCE ALSO SOLUBLE IN SUCH SOLVENT AND CONTAINING AS PART OF THE POLYMER STRUCTURE AT LEAST 0.32 GRAMS OF SULFUR, IN THE FORM OF SULFONIC ACID GROUPS AVAILABLE FOR REACTION WITH BASIC DYESTUFFS, PER KILOGRAM OF THE TOTAL COMPOSITION.
Claim 2
Dependent Claim
62 words
A COMPOSITION COMPRISING, AS THE MAJOR COMPONENT, A CELLULOSE DERIVATIVE SOLUBLE IN AN ORGANIC SOLVENT AND, AS A MINOR COMPONENT, AN ORGAIC POLMERIC SUBSTANCE ALSO SOLUBLE IN SUCH SOLVENT AND CONTAINING AS PART OF THE POLYMER STRUCTURE AT LEAST 0.32 GRAMS OF SULFUR, IN THE FORM OF SULFONIC ACID GROUPS AVAILABLE FOR REACTION WITH BASIC DYESTUFFS, PER KILOGRAM OF THE TOTAL COMPOSITION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |