Patent US2989798A successfully refreshed from Google Patents.
US2989798A
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Filaments of improved dye-receptivity
Assignee: EIDP Inc
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Filing: 1955-06-30
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Granted: 1961-06-27
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Expires: 1975-06-30
Abstract
No abstract record available.
Inventors
- 👤 Douglas G Bannerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:58
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/25; B29C48/30; B29C48/304; D01D; D01D5/00; D01D5/08; D01D5/28; D01D5/30; D01D5/34; Y; Y10; Y10S; Y10S264/00; Y10S264/26; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2964; Y10T428/2967
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A FILAMENT OF IMPROVED DYE RECEPTIVITY AND RETENTION COMPRISING A SHEATH-CORE FILAMENT HAVING COMPRISING AS A CORE A POLYMERIC SUBSTANCE CONTAINING AT LEAST 10**2 EQUIVALENTS OF AMINE END-GROUPS PER 10**6 GRAMS OF POLYMER AND AS A SHEATH A POLYMERIC SUBSTANCE HAVING FEWER THAN ABOUT 50 AMINE EQUIVALENTS PER 10**6 GRAMS OF POLYMER.
Claim 2
Dependent Claim
52 words
A FILAMENT OF IMPROVED DYE RECEPTIVITY AND RETENTION COMPRISING A SHEATH-CORE FILAMENT HAVING COMPRISING AS A CORE A POLYMERIC SUBSTANCE CONTAINING AT LEAST 10**2 EQUIVALENTS OF AMINE END-GROUPS PER 10**6 GRAMS OF POLYMER AND AS A SHEATH A POLYMERIC SUBSTANCE HAVING FEWER THAN ABOUT 50 AMINE EQUIVALENTS PER 10**6 GRAMS OF POLYMER.
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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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |