US4540609A
Expired / Lapsed
US
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Method for strengthening long chain synthetic polymer fibers
Assignee: Hill and Dunn Networks Inc
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Filing: 1983-10-25
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Granted: 1985-09-10
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Expires: 2003-10-25
Abstract
Abstract A method for strengthening long chain synthetic polymer fibers involves soaking a fibrous material in a treatment solution of potassium aluminum sulfate or ammonium aluminum sulfate, or both, in water. The treated material is immersed in a fixing solution containing a water soluble metallic carboxylate such as sodium or potassium stearate, and then rinsed with a nonreactive liquid.
Inventors
- 👤 Dennis B. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:44
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/188; D06M11/00; D06M11/51; D06M11/55; D06M11/57; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
51 words
A method for strengthening a synthetic fibrous material comprising the steps of: soaking the material in an aqueous treatment solution of alum wherein the concentration of alum is from about 5 to 200 grams per liter of water; rinsing the treated material in an aqueous solution; and drying the treated material.
Claim 2
Independent Claim
51 words
A method for strengthening a synthetic fibrous material comprising the steps of: soaking the material in an aqueous treatment solution of alum wherein the concentration of alum is from about 5 to 200 grams per liter of water; rinsing the treated material in an aqueous solution; and drying the treated material.
Claim 3
Dependent Claim
26 words
The method of claim 1, wherein the alum includes a member selected from the group consisting of hydrated potassium aluminum sulfate and hydrated ammonium aluminum sulfate.
Claim 4
Dependent Claim
25 words
The method of claim 2, wherein the concentration of alum is in the range of about 25 to about 75 grams per liter of water.
Claim 5
Dependent Claim
19 words
The method of claim 3, wherein the treatment solution comprises about 44.7 grams of alum per liter of water.
Claim 6
Dependent Claim
33 words
The method of claim 4, wherein the treatment solution includes about 38.0 grams of ammonium aluminum sulfate per liter of water and about 6.7 grams of potassium aluminum sulfate per liter of water.
Claim 7
Dependent Claim
18 words
The method of claim 2, wherein the treatment solution has both potassium aluminum sulfate and ammonium aluminum sulfate.
Claim 8
Dependent Claim
18 words
The method of claim 2, including the step of reducing the fiber diameter by at least 10 percent.
Claim 9
Dependent Claim
11 words
The method of claim 1, wherein said treated material is nylon.
Claim 10
Dependent Claim
11 words
The method of claim 8, wherein said material is nylon hosiery.
Claim 11
Dependent Claim
37 words
The method of claim 1 including the step of wetting the treated material with an aqueous fixing solution of a water soluble metallic carboxylate (R-COOR'), where R is an aliphatic chain and R' is an univalent metal.
Claim 12
Dependent Claim
23 words
The method of claim 10 wherein said metallic carboxylate is a member selected from the group consisting of sodium stearate and potassium stearate.
Claim 13
Independent Claim
49 words
A method for strengthening a synthetic fibrous material comprising the steps of: soaking the material in an aqueous treatment solution of alum, wherein the concentration of alum is above about 25 grams per liter of water; rinsing the treated material in an aqueous solution; and drying the treated material.
Claim 14
Independent Claim
49 words
A method for strengthening a synthetic fibrous material comprising the steps of: soaking the material in an aqueous treatment solution of alum, wherein the concentration of alum is above about 25 grams per liter of water; rinsing the treated material in an aqueous solution; and drying the treated material.
Claim 15
Dependent Claim
26 words
The method of claim 12 wherein the alum includes a member selected from the group consisting of hydrated potassium aluminum sulfate and hydrated ammonium aluminum sulfate.
Claim 16
Dependent Claim
17 words
The method of claim 12 including the step of reducing the fiber diameter by at least 10%.
Claim 17
Dependent Claim
11 words
The method of claim 12, wherein said treated material is nylon.
Claim 18
Dependent Claim
27 words
The method of claim 12, wherein the concentration of alum is in the range of from about 25 grams per liter to about 75 grams per liter.
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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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |