US3661501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic treatment of shaped articles made from fiber-forming synthetic polymers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1967-09-11
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Granted: 1972-05-09
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Expires: 1987-09-11
Abstract
Abstract Procedure for imparting durable antistatic properties to shaped articles made from fiber-forming polyesters or polyamides by modifying the surface thereof. The article is heated while in intimate contact with a polyethylene oxide derivative such as polyethylene glycol diamine and in the presence of an inorganic catalyst such as potassium iodide to effect surface modification thereof.
Inventors
- 👤 William Michael Corbett
- 👤 David Harrison
- 👤 Michael Mundie Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:29
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/372; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; D06M15/00; D06M15/19; D06M15/37; D06M15/643; D06M15/6436; C08J2471/00; Y; Y10; Y10S; Y10S260/00; Y10S260/21
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
19 words
The process of claim 1, wherein said diamine has a molecular weight of from about 1,500 to about 1,700.
Claim 2
Dependent Claim
71 words
The process of claim 2, wherein: a. the fiber-forming polyester is selected from the group consisting of poly(ethylene terephthalate), poly(1,4-bismethylene cyclohexane terephthalate), and poly(ethylene oxybenzoate); and b. said inorganic catalysts is selected from the group consisting of iodine, compounds of iron (in ferrous or ferric state), selenium dioxide, potassium iodide, potassium thiocyanate, sodium dihydrogen phosphate, chromium-containing compounds, hydriodic acid, iodic acid, periodic acid, phosphomolybdic acid, and the salts of these acids.
Claim 3
Dependent Claim
12 words
The process of claim 3, wherein said inorganic catalyst is potassium iodide.
References Cited (Backward Citations)
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US3047355A
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US3234185A
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US3473956A
Cited
US3428710A
Cited
US3445276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |