US4839212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stain resistant nylon carpets
Assignee: Solutia Inc
•
Filing: 1988-04-07
•
Granted: 1989-06-13
•
Expires: 2008-04-07
Abstract
Abstract Nylon carpet fibers are provided which resist staining by acid dye colorants at room temperature, yet are dyeable at elevated temperatures with acid dyes without losing their resistance to acid dye colorants at room temperature. The fibers are characterized by having a coating on the surface thereof comprising one or more selected compounds (stain blockers). Carpets comprising the fibers resist staining when exposed for long periods of time to spills containing acid dye colorants. By also including a fluorochemical in the coating, the carpets can resist such staining even after being subjected to heavy human trafficking.
Inventors
- 👤 Randolph C. Blyth
- 👤 Pompelio A. Ucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:26
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/277; D06M15/37; D06M15/39; D06M15/41; D06M15/412; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986; Y10T428/23993; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A dyed carpet having a pile composed of nylon fibers, said carpet being characterized in that said fibers are coated with a sufficient amount of a sulfonated condensation product containing --SO 3 X radicals, where X is hydrogen or a cation, to provide a carpet which, when 64 ounces (1892.5 ml) of an aqueous solution of cherry flavored soft drink premix containing 0.054 grams per liter of Red Dye No. 40 is poured onto said pile from a height of one meter and left overnight followed by washing of said pile with water for removal of excess solution therefrom, no visual evidence of said Red Dye No. 40 remains on said pile.
Claim 2
Dependent Claim
112 words
A dyed carpet having a pile composed of nylon fibers, said carpet being characterized in that said fibers are coated with a sufficient amount of a sulfonated condensation product containing --SO 3 X radicals, where X is hydrogen or a cation, to provide a carpet which, when 64 ounces (1892.5 ml) of an aqueous solution of cherry flavored soft drink premix containing 0.054 grams per liter of Red Dye No. 40 is poured onto said pile from a height of one meter and left overnight followed by washing of said pile with water for removal of excess solution therefrom, no visual evidence of said Red Dye No. 40 remains on said pile.
Claim 3
Dependent Claim
13 words
The carpet of claim 1 wherein said nylon fibers are nylon 66 fibers.
Claim 4
Dependent Claim
15 words
The carpet of claim 2 wherein said condensation product is a sulfonated phenol-formaldehyde condensation product.
Claim 5
Dependent Claim
25 words
The carpet of claim 3 wherein said sulfonated phenol- formaldehyde condensation product is a condensation product of phenol sulfonic acid with dihydroxy diphenylsulfone and formaldehyde.
Claim 6
Dependent Claim
23 words
The carpet of claim 2 wherein said condensation product is a condensation product of a naphthalene monosulfonic acid with dihydroxy diphenylsulfone and formaldehyde.
Claim 7
Dependent Claim
14 words
The carpet of claim 2 wherein said carpet is of a cut pile construction.
References Cited (Backward Citations)
US3178309A
Cited
US3118723A
Cited
US3322488A
Cited
US3663157A
Cited
US3765839A
Cited
US3849162A
Cited
GB1369586A
Cited
US4030880A
Cited
US4192754A
Cited
US4325890A
Cited
US4302202A
Cited
US4295852A
Cited
US4592940A
Cited
US4501591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |