US3267192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making elastic filaments
Assignee: Polythane Corp
•
Filing: 1961-08-22
•
Granted: 1966-08-16
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Expires: 1981-08-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Timothy V Peters
- 👤 Schneider A David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:30
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/70; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0847; C08G18/0852; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD OF PREPARING SYNTHETIC ELASTIC COPOLYMER FILAMENTS WHICH COMPRISES HEATING A DIFUNCTIONAL HYDROXY TERMINATED POLYMER HAVING A MOLECULAR WEIGHT ABOVE ABOUT 700 WITH AN ORGANIC DIISOCYANATE TO PREDUCE A LOW MOLECULAR WEIGHT ISOCYANATE TERMINATED PREPOLYMER, REACTING THE RESULTING ISOCYANATE TERMINATED PREPOLYMER WITH LESS THAN THE STOICHIOMETRIC AMOUNT OF A DIAMINE IN ADMIXTURE WITH A SOLVENT FOR THE REACTANTS AND THE RESULTING REACTION PRODUCT TO FORM A SEMI-POLYMER SOLUTION CONTAINING TERMINAL ISOCYANATE GROUPS, ADDING THERETO AN ORGANIC DIISOCYANATE, EXTRUDING THE SEMI-POLYMER SOLUTION CONTAINING THE ADDED DIISOCYANATE INTO A BATH TO EXTRACT THE SOLVENT AND FORM FILAMENTS, REMOVING THE FILAMENTS FROM THEBATH AND CURING SAID FILAMENTS.
Claim 2
Independent Claim
105 words
THE METHOD OF PREPARING SYNTHETIC ELASTIC COPOLYMER FILAMENTS WHICH COMPRISES HEATING A DIFUNCTIONAL HYDROXY TERMINATED POLYMER HAVING A MOLECULAR WEIGHT ABOVE ABOUT 700 WITH AN ORGANIC DIISOCYANATE TO PREDUCE A LOW MOLECULAR WEIGHT ISOCYANATE TERMINATED PREPOLYMER, REACTING THE RESULTING ISOCYANATE TERMINATED PREPOLYMER WITH LESS THAN THE STOICHIOMETRIC AMOUNT OF A DIAMINE IN ADMIXTURE WITH A SOLVENT FOR THE REACTANTS AND THE RESULTING REACTION PRODUCT TO FORM A SEMI-POLYMER SOLUTION CONTAINING TERMINAL ISOCYANATE GROUPS, ADDING THERETO AN ORGANIC DIISOCYANATE, EXTRUDING THE SEMI-POLYMER SOLUTION CONTAINING THE ADDED DIISOCYANATE INTO A BATH TO EXTRACT THE SOLVENT AND FORM FILAMENTS, REMOVING THE FILAMENTS FROM THEBATH AND CURING SAID FILAMENTS.
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |