US2505033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing high tenacity regenerated cellulose yarns
Assignee: Celanese Corp
•
Filing: 1945-05-01
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Granted: 1950-04-25
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Expires: 1965-05-01
Abstract
No abstract record available.
Inventors
- 👤 William J Elvin
- 👤 John B Steiding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:44
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/38; D06M11/385; D01; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A PROCESS FOR THE PRODUCTION OF IMPROVED HIGH TENACITY REGENERATED CELLULOSE YARNS BY THE SAPONIFICATION OF STRETCHED YARNS HAVING A BASIS OF AN ORGANIC ESTER OF CELLULOSE, WHEREIN THE YARNS UNDERGOING SAPONIFICATION INCREASE IN LENGTH AND THEN DECREASE IN LENGTH AS SAID SAPONIFICATION PROCEEDS, THE STEP WHICH COMPRISES CONTINUOUSLY FEEDING SAID ORGANIC ESTER OF CELLULOSE YARNS INTO A SAPONIFYING BATH AND PLACING THE WETTED YARNS UNDER A CONTROLLED AND PREDETERMINED TENSION OF 0.02 TO 0.5 GRAM PER DENIER IN THE SAPONIFYING BATH THROUGHOUT THE ENTIRE SAPONIFICATION PROCESS, WHEREBY THE DEGREE OF SHRINKAGE EFFECTED BY THE SAPONIFICATION REACTION IS LIMITED TO LESS THAN THAT EFFECTED WHEN SAID YARNS ARE SAPONIFIED IN A SUBSTANTIALLY UNTENSIONED CONDITION.
Claim 2
Dependent Claim
115 words
IN A PROCESS FOR THE PRODUCTION OF IMPROVED HIGH TENACITY REGENERATED CELLULOSE YARNS BY THE SAPONIFICATION OF STRETCHED YARNS HAVING A BASIS OF AN ORGANIC ESTER OF CELLULOSE, WHEREIN THE YARNS UNDERGOING SAPONIFICATION INCREASE IN LENGTH AND THEN DECREASE IN LENGTH AS SAID SAPONIFICATION PROCEEDS, THE STEP WHICH COMPRISES CONTINUOUSLY FEEDING SAID ORGANIC ESTER OF CELLULOSE YARNS INTO A SAPONIFYING BATH AND PLACING THE WETTED YARNS UNDER A CONTROLLED AND PREDETERMINED TENSION OF 0.02 TO 0.5 GRAM PER DENIER IN THE SAPONIFYING BATH THROUGHOUT THE ENTIRE SAPONIFICATION PROCESS, WHEREBY THE DEGREE OF SHRINKAGE EFFECTED BY THE SAPONIFICATION REACTION IS LIMITED TO LESS THAN THAT EFFECTED WHEN SAID YARNS ARE SAPONIFIED IN A SUBSTANTIALLY UNTENSIONED CONDITION.
References Cited (Backward Citations)
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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) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |