Patent US3896035A successfully refreshed from Google Patents.
US3896035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile fabric treating composition providing soil resistance
Assignee: 3M Co
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Filing: 1973-04-02
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Granted: 1975-07-22
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Expires: 1993-04-02
Abstract
Abstract A durably soil-resistant pile fabric, such as a carpet, is provided which comprises a plurality of organic fibers having thereon a normally solid coating comprising (a) a first phase of a water-insoluble fluoroaliphatic radical free urethane adduct having at least one major transition temperature higher than about 45*C. and melting to a flowable liquid below about 200* C. and (b) a second phase of water-insoluble fluoroaliphatic radical containing urethane adduct having at least one major transition temperature higher than about 45* C. and melting to a flowable liquid below about 200* C.
Inventors
- 👤 William J Schultz
- 👤 Samuel Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:19
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/425; D06M13/428; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/288; C08G18/2885; C08G18/30; C08G18/38; C08G18/3855; C08G18/3857; C08G18/3861; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06M15/576; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
A TREATING SOLUTION FOR RENDERING PILE FABRICS STAIN-REPELLENT AND OILS-RESISTANT WHILE AVOIDING AN INCREASE IN FLAMMABILITY, CONSISTING ESSENTIALLY OF A DISPERSION IN LIQUID MEDIUM AT A TOTAL SOLIDS CONCENTRATION OF FROM ABUT 0.1 TO ABOUT 50% BY WEIGHT OF THE COMBINATION OF FLUOROALIPHATIC RADICAL-CONTAINING URETHANE ADDUCT AND FLUOROALIPHATIC RADICAL FREE URETHANE ADDUCT IN PROPORTIONS OF FROM ABOUT 1:1.5 TO ABOUT 4:1 EACH OF SAID ADDUCTS MELTING TO A FLOWABLE LIQUID AT ABOVE 45*C. AND BELOW ABOUT 200*C.
Claim 2
Dependent Claim
77 words
A TREATING SOLUTION FOR RENDERING PILE FABRICS STAIN-REPELLENT AND OILS-RESISTANT WHILE AVOIDING AN INCREASE IN FLAMMABILITY, CONSISTING ESSENTIALLY OF A DISPERSION IN LIQUID MEDIUM AT A TOTAL SOLIDS CONCENTRATION OF FROM ABUT 0.1 TO ABOUT 50% BY WEIGHT OF THE COMBINATION OF FLUOROALIPHATIC RADICAL-CONTAINING URETHANE ADDUCT AND FLUOROALIPHATIC RADICAL FREE URETHANE ADDUCT IN PROPORTIONS OF FROM ABOUT 1:1.5 TO ABOUT 4:1 EACH OF SAID ADDUCTS MELTING TO A FLOWABLE LIQUID AT ABOVE 45*C. AND BELOW ABOUT 200*C.
Claim 3
Dependent Claim
15 words
A treating solution according to claim 1 wherein the liquid medium is an aqueous medium.
Claim 4
Dependent Claim
29 words
A treating solution according to claim 1 wherein the fluoroaliphatic radical-containing urethane adduct is (C8F17SO2NRC2H4OCONH)2 C6 H3 CH3 in which R is alkyl of 1 to 3 carbon atoms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |