Patent US2984636A successfully refreshed from Google Patents.
US2984636A
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Reacting aromatic diisocyanate and ethylene glycol in dimethylsulfoxide, solutions obtained therefrom, and filament
Assignee: EIDP Inc
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Filing: 1957-05-08
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Granted: 1961-05-16
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Expires: 1977-05-08
Abstract
No abstract record available.
Inventors
- 👤 Donald J Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/7671; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0847; C08G18/0852; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3206; D; D01; D01F; D01F6/00; D01F6/58; D01F6/70; D01F6/72
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
18 words
THE PROCESS OF DIRECTLY PREPARING HIGH MOLECULAR WEIGHT POLYURETHANE FILAMENTS COMPRISING REACTING AN AROMATIC DIISOCYANATE OF THE FORMULA
Claim 2
Dependent Claim
18 words
THE PROCESS OF DIRECTLY PREPARING HIGH MOLECULAR WEIGHT POLYURETHANE FILAMENTS COMPRISING REACTING AN AROMATIC DIISOCYANATE OF THE FORMULA
Claim 3
Dependent Claim
20 words
THE PROCESS OF CLAIM 1 WHEREIN THE INHERENT VISCOSITY OF THE RESULTING POLYMER IS BETWEEN ABOUT 0.4 AND ABOUT 1.4.
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) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |