US3121764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of elastic filaments of polyesters containing isocyanate end groups
Assignee: Glanzstoff AG
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Filing: 1962-10-09
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Granted: 1964-02-18
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Expires: 1982-10-09
Abstract
No abstract record available.
Inventors
- 👤 Macura Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:00
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/06; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; D01F; D01F6/00; D01F6/58; D01F6/70; Y; Y10; Y10S; Y10S264/00; Y10S264/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A PROCESS FOR PRODUCTION OF ELASTIC FILAMENTS, THE STEPS OF FORMING A SPINNING SOLUTION WHICH COMPRISE INCORPORATING INTO A SOLUTION IN AN ORGANIC SOLVENT OF A POLYESTER POLYMER OF AN ALKANE DICARBOXYLIC ACID AND AN ALKYLENE GLYCOL, SAID POLYMER HAVING ISOCYANATE END GROUPS, 1-5% BY WEIGHT, BASED ON SAID POLYESTER POLYMER WITH ISOCYANATE TERMINAL GROUPS, OF A FLUOROALKYL ESTER OF A POLYCARBOXY ACID SELECTED FROM THE GROUP CONSISTING OF CAMPHORIC ACID AND PYROMELLITIC ACID, SAID FLUOROALKYL GROUP OF SAID ESTER HAVING THE FORMULA
Claim 2
Dependent Claim
84 words
IN A PROCESS FOR PRODUCTION OF ELASTIC FILAMENTS, THE STEPS OF FORMING A SPINNING SOLUTION WHICH COMPRISE INCORPORATING INTO A SOLUTION IN AN ORGANIC SOLVENT OF A POLYESTER POLYMER OF AN ALKANE DICARBOXYLIC ACID AND AN ALKYLENE GLYCOL, SAID POLYMER HAVING ISOCYANATE END GROUPS, 1-5% BY WEIGHT, BASED ON SAID POLYESTER POLYMER WITH ISOCYANATE TERMINAL GROUPS, OF A FLUOROALKYL ESTER OF A POLYCARBOXY ACID SELECTED FROM THE GROUP CONSISTING OF CAMPHORIC ACID AND PYROMELLITIC ACID, SAID FLUOROALKYL GROUP OF SAID ESTER HAVING THE FORMULA
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) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |