US3414644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for spinning bicomponent cellulose esters
Assignee: Celanese Corp
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Filing: 1965-01-04
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Granted: 1968-12-03
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Expires: 1985-01-04
Abstract
No abstract record available.
Inventors
- 👤 William J Myles
- 👤 Roland K Kunkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:42
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS COMPRISING PASSING A SPINNING SOLUTION OF A SAPONIFIABLE CELLULOSE ESTER CONTAINING A MINOR PROPORTION OF A QUATERNARY AMMONIUM SALT AND A SPINNING SOLUTION OF A CELLULOSE ESTER IN THE ABSENCE OF SAID QUATERNARY AMMONIUM SALT THROUGH SEPARATE ZONES, BRINGING STREAMS OF SAID SOLUTIONS TOGETHER AT A COMMON JUNCTURE UNDER CONDITIONS SUCH THAT SUBSTANTIALLY NO MIXING OF SAID SOLUTIONS TAKES PLACE AND PASSING A SINGLE STREAM CONTAINING SEPARATE PORTIONS OF SAID SOLUTIONS INTO AN EVAPORATIVE ATMOSPHERE FOR THE SOLVENT TO FORM A FILAMENT COMPOSED OF TWO PORTIONS OF SAID CELLULOSE ESTER IN ECCENTRIC RELATIONSHIP, ONE PORTION CONTAINING SAID QUATERNARY AMMONIUM SALT DISPERSED THROUGHOUT WHILE THE OTHER PORTION IS FREE OF SAID SALT.
Claim 2
Dependent Claim
113 words
A PROCESS COMPRISING PASSING A SPINNING SOLUTION OF A SAPONIFIABLE CELLULOSE ESTER CONTAINING A MINOR PROPORTION OF A QUATERNARY AMMONIUM SALT AND A SPINNING SOLUTION OF A CELLULOSE ESTER IN THE ABSENCE OF SAID QUATERNARY AMMONIUM SALT THROUGH SEPARATE ZONES, BRINGING STREAMS OF SAID SOLUTIONS TOGETHER AT A COMMON JUNCTURE UNDER CONDITIONS SUCH THAT SUBSTANTIALLY NO MIXING OF SAID SOLUTIONS TAKES PLACE AND PASSING A SINGLE STREAM CONTAINING SEPARATE PORTIONS OF SAID SOLUTIONS INTO AN EVAPORATIVE ATMOSPHERE FOR THE SOLVENT TO FORM A FILAMENT COMPOSED OF TWO PORTIONS OF SAID CELLULOSE ESTER IN ECCENTRIC RELATIONSHIP, ONE PORTION CONTAINING SAID QUATERNARY AMMONIUM SALT DISPERSED THROUGHOUT WHILE THE OTHER PORTION IS FREE OF SAID SALT.
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |