US3594448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament comprising a polymer blend of polyester and polyamide containing a sterically hindered phenolic compound
Assignee: Honeywell International Inc
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Filing: 1969-04-16
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Granted: 1971-07-20
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Expires: 1989-04-16
Abstract
Abstract A PROCESS FOR INCREASING THE WHITENESS OF A FILAMENT EXTRUDED FROM A POLYMER BLEND COMPRISED OF POLYESTER AND POLYAMIDE WHICH COMPRISES INCORPORATING IN THE POLYMER BLEND, PRIOR TO EXTRUSION THEREOF, ABOUT 0.1 TO 5 WEIGHT PERCENT, BASED UPON THE WEIGHT OF THE POLYAMIDE AND POLYESTER, OF A STERICALLY HINDERED PHENOLIC COMPOUND AND MELT EXTRUDING THE POLYMER BLEND TO FORM A FILAMENT HAVING INCREASED WHITENESS.
Inventors
- 👤 Amnon Birenzvige
- 👤 Gene C Weedon
- 👤 Richard E Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/02; C08L67/00; D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D01F6/00; D01F6/88; D01F6/90; D01F6/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |