Patent US3732346A successfully refreshed from Google Patents.
US3732346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method to produce spun-drawn polycaprolactam yarn having improved resistance to ozone fading
Assignee: Honeywell International Inc
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Filing: 1970-08-10
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Granted: 1973-05-08
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Expires: 1990-08-10
Abstract
Abstract AA CONTINUOUS PROCESS AND ITS PRODUCT FOR SPINNING AND DRAWING POLYCARPROAMIDE FILAMENTS IS DISCLOSED. THE METHOD IS THE COUPLED OR CONTINUOUS PROCESS OF EXTRUDING FILAMENTS, COOLING AND APPLYING FINISH, THEN IMMEDIATELY DRAWING THE FILAMENTS. THE IMPROVED RESISTANCE TO OZONE FADING IS ACCOMPLISHED BY FEEDING THE FILAMENTS AFTER THE FINISH APPLYING STEP WITH A HEATED FEED ROLL THROUGH AN AIR COOLING JET TO A COOLED DRAW ROLL AND WITHDRAWING FILAMENTS TO A SECOND DRAW ROLL, THEN WINDING THE FILAMENTS INTO A PACKAGE.
Inventors
- 👤 W Mallonee
- 👤 P Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:20
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/228; D01; D01F; D01F6/00; D01F6/58; D01F6/60
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |