US3874965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrillated yarn carpet backing
Assignee: Celanese Corp
•
Filing: 1973-08-13
•
Granted: 1975-04-01
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Expires: 1993-08-13
Abstract
Abstract A process for the preparation of a carpet backing the process comprising hot-melt attenuation foam fibrillating a thermoplastic extrudate to strand form, and then securing the strands into a backing fabric.
Inventors
- 👤 Emmett T Greenwald
- 👤 Richard A Kenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:27
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; D05; D05C; D05C17/00; D05C17/02; D05C17/023; D10; D10B; D10B2503/00; D10B2503/04; D10B2503/041; D10B2503/042; Y; Y10; Y10S; Y10S264/00; Y10S264/08; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A PROCESS FOR PRODUCING A CARPET BACKING COMPRISING: A. PRODUCING A FOAMED EXTRUDATE FROM A MIXTURE COMPRISING A MOLTEN THERMOPLASTIC POLYMER AND A FOAMING AGENT WHICH IS OR EVOLVES GAS AT EXTRUSION TEMPERATURE, (B) HOT-MELT ATTENUATING SAID FOAMED EXTRUDATE AT TEMPERATURES ABOVE THE GLASS TRANSITION TEMPERATURE OF THE POLYMER, (C) PROCESSING SAID EXTRUDATE TO STRAND FORM AND (D) FORMULATING SAID STRANDS INTO A BACKING FABRIC WHEREIN SAID FABRIC IS HEAT STABILIZED AT TEMPERATURES OF FROM ABOUT 260*F. TO ABOUT 300*F. FOR A PERIOD OF FROM ABOUT 15 SECONDS TO ABOUT 90 SECONDS AND CALENDERED AT PRES-
Claim 2
Dependent Claim
96 words
A PROCESS FOR PRODUCING A CARPET BACKING COMPRISING: A. PRODUCING A FOAMED EXTRUDATE FROM A MIXTURE COMPRISING A MOLTEN THERMOPLASTIC POLYMER AND A FOAMING AGENT WHICH IS OR EVOLVES GAS AT EXTRUSION TEMPERATURE, (B) HOT-MELT ATTENUATING SAID FOAMED EXTRUDATE AT TEMPERATURES ABOVE THE GLASS TRANSITION TEMPERATURE OF THE POLYMER, (C) PROCESSING SAID EXTRUDATE TO STRAND FORM AND (D) FORMULATING SAID STRANDS INTO A BACKING FABRIC WHEREIN SAID FABRIC IS HEAT STABILIZED AT TEMPERATURES OF FROM ABOUT 260*F. TO ABOUT 300*F. FOR A PERIOD OF FROM ABOUT 15 SECONDS TO ABOUT 90 SECONDS AND CALENDERED AT PRES-
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said thermoplastic extrudate has a coloring component disposed therein.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein said thermoplastic extrudate is a thermoplastic material selected from a group consisting of polyethylene, polypropylene, polyamide, polyester, polystyrene and combinations thereof.
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |