US4963409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stain resistant polymers and textiles
Assignee: EIDP Inc
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Filing: 1987-11-23
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Granted: 1990-10-16
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Expires: 2007-11-23
Abstract
Abstract Synthetic polyamide textile substrate having deposited thereon a modified polymeric sulfonated phenol-formaldehyde condensation product comprising one (a) in which 10 to 25% of the polymer units contain SO 3 (-) radicals and about 90 to 75% of the polymer units contain sulfone radicals and (b) in which a portion of the free hydroxyl groups thereof has been acylated or etherified, the number of said hydroxyl groups which has been acylated or etherified being sufficient to inhibit yellowing of said condensation product but insufficient to reduce materially the capacity of said condensation product to impart stain resistance to said synthetic polyamide textile substrate.
Inventors
- 👤 Theodor A. Liss
- 👤 Leonard H. Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:14
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41; D06M15/412; Y; Y10; Y10S; Y10S8/00; Y10S8/21; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T442/00; Y10T442/20; Y10T442/2279; Y10T442/2861; Y10T442/2893
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
A synthetic polyamide textile substrate having deposited thereon a modified polymeric sulfonated phenol-formaldehyde condensation product comprising one (a) in which between about 10 to 25% of the polymer units contain SO 3 (-) radicals and about 90 to 75% of the polymer units contain sulfone radicals and (b) in which a portion of the free hydroxyl groups thereof has been acylated or etherified, the number of said hydroxyl groups which has been acylated or etherified being sufficient to inhibit yellowing of said condensation product but insufficient to reduce materially the capacity of said condensation product to impart stain resistance to said synthetic polyamide textile substrate.
Claim 2
Dependent Claim
105 words
A synthetic polyamide textile substrate having deposited thereon a modified polymeric sulfonated phenol-formaldehyde condensation product comprising one (a) in which between about 10 to 25% of the polymer units contain SO 3 (-) radicals and about 90 to 75% of the polymer units contain sulfone radicals and (b) in which a portion of the free hydroxyl groups thereof has been acylated or etherified, the number of said hydroxyl groups which has been acylated or etherified being sufficient to inhibit yellowing of said condensation product but insufficient to reduce materially the capacity of said condensation product to impart stain resistance to said synthetic polyamide textile substrate.
Claim 3
Dependent Claim
22 words
The textile substrate of claim 1 wherein said portion of said free hydroxyl groups has been acylated through reaction with acetic anhydride.
Claim 4
Dependent Claim
22 words
The textile substrate of claim 1 wherein said portion of said free hydroxyl groups has been acylated through reaction with ethyl chloroformate.
Claim 5
Dependent Claim
21 words
The textile substrate of claim 1 wherein said portion of said free hydroxyl groups has been etherified through reaction with dimethylsulfate.
Claim 6
Dependent Claim
22 words
The textile substrate of claim 1 wherein said portion of said free hydroxyl groups has been etherified through reaction with chloroacetic acid.
Claim 7
Dependent Claim
27 words
The textile substrate of claim 2 in which the water layer formed in acylation or etherification has been separated from said modified polymeric sulfonated phenol-formaldehyde condensation product.
Claim 8
Dependent Claim
20 words
The textile substrate of claim 6 wherein said modified polymeric sulfonated phenol-formaldehyde condensation has been dissolved in a hydroxy-containing material.
Claim 9
Dependent Claim
13 words
The textile substrate of claim 7 wherein said hydroxy-containing material is ethylene glycol.
References Cited (Backward Citations)
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US4302202A
Cited
US4391718A
Cited
US4592940A
Cited
US4501591A
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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) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |