Patent US2899262A successfully refreshed from Google Patents.
US2899262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for rendering
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:45
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/70; D06P3/74; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38; D06P1/00; D06P1/44; D06P1/52; D06P1/5207; D06P1/5214; D06P1/5242; D06P1/64; D06P1/642; D06P1/645; D06P1/647; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A PROCESS IN WHICH A POLYMER CONTAINING AT LEAST 85 PERCENT OF ACRYLONITRILE IN THE POLYMER MOLECULE IS SPUN FROM AN AQUEOUS SALINE SOLUTION THEREOF INTO AN AQUEOUS COAGULANT, THE SPUN PRODUCT IS STRETCHED TO AN EXTENT SUFFICIENT TO YIELD A DRIED PRODUCT HAVING A YIELD POINT OF AT LEAST 0.8 GRAM PER DENIER, AND THE STRETCHED PRODUCT IS SUBSTANTIALLY FREED FROM SALINE CONSTITUENTS AND DRIED TO DESTROY THE AQUAGEL CONDITION, THE IMPROVEMENT WHICH CONSISTS IN: APPLYING TO THE PRODUCT WHILE STILL IN THE AQUAGEL CONDITION AT LEAST 1.0 PERCENT OF ITS DRY WEIGHT OF A WATER-SOLUBLE SALT OF AN N-CARBOXYALKYL DERIVATIVE OF A POLYETHYLENE AMINE HAVING A MOLECULE WEIGHT OF A LEAST 200, DRYING THE SO-TREATED PRODUCT IRREVERSIBLY, AND THEREAFTER DYEING THE PRODUCT.
Claim 2
Dependent Claim
125 words
IN A PROCESS IN WHICH A POLYMER CONTAINING AT LEAST 85 PERCENT OF ACRYLONITRILE IN THE POLYMER MOLECULE IS SPUN FROM AN AQUEOUS SALINE SOLUTION THEREOF INTO AN AQUEOUS COAGULANT, THE SPUN PRODUCT IS STRETCHED TO AN EXTENT SUFFICIENT TO YIELD A DRIED PRODUCT HAVING A YIELD POINT OF AT LEAST 0.8 GRAM PER DENIER, AND THE STRETCHED PRODUCT IS SUBSTANTIALLY FREED FROM SALINE CONSTITUENTS AND DRIED TO DESTROY THE AQUAGEL CONDITION, THE IMPROVEMENT WHICH CONSISTS IN: APPLYING TO THE PRODUCT WHILE STILL IN THE AQUAGEL CONDITION AT LEAST 1.0 PERCENT OF ITS DRY WEIGHT OF A WATER-SOLUBLE SALT OF AN N-CARBOXYALKYL DERIVATIVE OF A POLYETHYLENE AMINE HAVING A MOLECULE WEIGHT OF A LEAST 200, DRYING THE SO-TREATED PRODUCT IRREVERSIBLY, AND THEREAFTER DYEING THE PRODUCT.
References Cited (Backward Citations)
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US2135633A
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US2347508A
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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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |