US2924501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet-spinning of polyester fibers
Assignee: Solutia Inc
•
Filing: 1956-10-22
•
Granted: 1960-02-09
•
Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 William S Wagner
- 👤 William A H Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:22
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D01F6/78; D01F6/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR FORMING SHAPED ARTICLES FROM A POLYESTER POLYMER WHICH COMPRISES EXTRUDING A SOLUTION OF A SYNTHETIC LINEAR CONDENSATION POLYESTER IN A SOLVENT THEREFOR COMPRISING A PHENOL IN MAJOR PROPORTION INTO A COAGULATING MEDIUM SELECTED FROM THE GROUP CONSISTING OF N,N-DIMETHYLFORMAMIDE, N,N-DIMETHYLACETAMIDE, AND MIXTURES THEREOF WITH WATER, SAID POLYESTER COMPRISING SHAPED ARTICLES WITH WATER, SAID POLYESTER COMPRISING THE REACTION PRODUCT OF AT LEAST ONE DICARBOXYLIX ACID AND AT LEAST ONE GLYCOL OF THE SERIES HO(CH2)N-OH, WHEREIN N IS AN INTEGER FROM 2 TO 10.
Claim 2
Dependent Claim
85 words
A PROCESS FOR FORMING SHAPED ARTICLES FROM A POLYESTER POLYMER WHICH COMPRISES EXTRUDING A SOLUTION OF A SYNTHETIC LINEAR CONDENSATION POLYESTER IN A SOLVENT THEREFOR COMPRISING A PHENOL IN MAJOR PROPORTION INTO A COAGULATING MEDIUM SELECTED FROM THE GROUP CONSISTING OF N,N-DIMETHYLFORMAMIDE, N,N-DIMETHYLACETAMIDE, AND MIXTURES THEREOF WITH WATER, SAID POLYESTER COMPRISING SHAPED ARTICLES WITH WATER, SAID POLYESTER COMPRISING THE REACTION PRODUCT OF AT LEAST ONE DICARBOXYLIX ACID AND AT LEAST ONE GLYCOL OF THE SERIES HO(CH2)N-OH, WHEREIN N IS AN INTEGER FROM 2 TO 10.
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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |