US2843449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry spinning process
Assignee: Eastman Kodak Co
•
Filing: 1954-04-13
•
Granted: 1958-07-15
•
Expires: 1974-04-13
Abstract
No abstract record available.
Inventors
- 👤 David W Raynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:45
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE METHOD OF FORMING CELLULOSE ORGANIC ACID ESTER FILAMENTS HAVING A SIX-LOBE SHAPED CROSS-SECTION, WHICH COMPRISES EXTRUDING A CELLULOSE ORGANIC ACID ESTER FILAMENT-FORMING SOLUTION THROUGH A SPINNERETTE EQUIPPED WITH SIX-POINT STAR-SHAPED EXTRUSION ORIFICES AND INTO A DRY SPINNING CABINET, DRAFTING THE FILAMENTS AT A DRAFT RATIO WITHIN THE RANGE OF APPROXIMATELY 0.7 TO 1.4 WHILE
Claim 2
Independent Claim
55 words
THE METHOD OF FORMING CELLULOSE ORGANIC ACID ESTER FILAMENTS HAVING A SIX-LOBE SHAPED CROSS-SECTION, WHICH COMPRISES EXTRUDING A CELLULOSE ORGANIC ACID ESTER FILAMENT-FORMING SOLUTION THROUGH A SPINNERETTE EQUIPPED WITH SIX-POINT STAR-SHAPED EXTRUSION ORIFICES AND INTO A DRY SPINNING CABINET, DRAFTING THE FILAMENTS AT A DRAFT RATIO WITHIN THE RANGE OF APPROXIMATELY 0.7 TO 1.4 WHILE
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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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |