Patent US5202480A successfully refreshed from Google Patents.
US5202480A
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Fluorination of acetals, ketals and orthoesters
Assignee: Exfluor Research Corp
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Filing: 1991-08-30
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Granted: 1993-04-13
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Expires: 2011-08-30
Abstract
Abstract This invention pertains to perfluoropolyethers and perhalogenated chlorofluoroether polymers that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.
Inventors
- 👤 Thomas R. Bierschenk
- 👤 Timothy Juhlke
- 👤 Hajimu Kawa
- 👤 Richard J. Lagow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:33
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/60; C07C41/48; C07C43/00; C07C43/30; C07C43/313; C07C43/315; C08; C08G; C08G2/00; C08G2/30; C08G4/00; C08G65/00; C08G65/002; C08G65/005; C08G65/007; C08G65/02; C08G65/30; C08G65/32; C08G65/321; C08G65/323; C08G65/3233; C08G65/3236; C08G65/34; C08G65/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A perhalogenated polyether having an average formula: ##STR25## wherein X i selected from the group consisting of --(CF 2 ) r COOH, --(CF 2 ) r OCF 3 , --(CF 2 ) r COF and -C r F 2r+1 -q where r is an integer from 1 to 12 and q is an integer from 0 to 25; wherein n is an integer from 1 to 50; and wherein R is selected from the group consisting of --F, --CF 2 Cl, --CFCl 2 , CCl 3 and perfluoroalkyl on one to ten carbons.
Claim 2
Dependent Claim
93 words
A perhalogenated polyether having an average formula: ##STR25## wherein X i selected from the group consisting of --(CF 2 ) r COOH, --(CF 2 ) r OCF 3 , --(CF 2 ) r COF and -C r F 2r+1 -q where r is an integer from 1 to 12 and q is an integer from 0 to 25; wherein n is an integer from 1 to 50; and wherein R is selected from the group consisting of --F, --CF 2 Cl, --CFCl 2 , CCl 3 and perfluoroalkyl on one to ten carbons.
Claim 3
Dependent Claim
92 words
A perhalogenated polyether having an average formula: ##STR26## wherein X is selected from the group consisting of --(CF 2 ) r COOH, --(CF 2 ) r OCF 3 , --(CF 2 ) r COF and -C r F 2r+1-q Cl q where r is an integer from 1 to 12 and q is an integer from 0 to 25; wherein n is an integer from 1 to 50;and wherein R is selected from the group consisting --F, --CF 2 Cl, --CFCl 2 , CCl 3 and perfluoroalkyl of one to ten carbons.
Claim 4
Dependent Claim
92 words
A perhalogenated polyether having an average formula: ##STR26## wherein X is selected from the group consisting of --(CF 2 ) r COOH, --(CF 2 ) r OCF 3 , --(CF 2 ) r COF and -C r F 2r+1-q Cl q where r is an integer from 1 to 12 and q is an integer from 0 to 25; wherein n is an integer from 1 to 50;and wherein R is selected from the group consisting --F, --CF 2 Cl, --CFCl 2 , CCl 3 and perfluoroalkyl of one to ten carbons.
Claim 5
Dependent Claim
152 words
A perhalogenated polyether having an average formula: ##STR27## wherein X and Z are the same or different and are selected from the group consisting of --(CF 2 ) r COF, --((CF 2 ) r OCF 3 , --(CF 2 O r COOH and --C r F 2r+1-q Cl q , wherein r is an integer from 1 to 12 and q is an integer from 0 to 25, wherein R 1 and R 2 are the same or different and are selected from the group consisting of --F, --Cl, --CF 2 Cl, --CFCl 2 , --CCl 3 , perfluoroalkyl of one to ten carbon atoms and perfluoroalkoxyalkyl of one to ten carbon atoms, wherein one or more of the fluorine atoms may be substituted by a halogen atom or other than fluorine, provided that R 1 and R 2 together are not F, wherein n is an integer from 2 to 1000.
Claim 6
Dependent Claim
152 words
A perhalogenated polyether having an average formula: ##STR27## wherein X and Z are the same or different and are selected from the group consisting of --(CF 2 ) r COF, --((CF 2 ) r OCF 3 , --(CF 2 O r COOH and --C r F 2r+1-q Cl q , wherein r is an integer from 1 to 12 and q is an integer from 0 to 25, wherein R 1 and R 2 are the same or different and are selected from the group consisting of --F, --Cl, --CF 2 Cl, --CFCl 2 , --CCl 3 , perfluoroalkyl of one to ten carbon atoms and perfluoroalkoxyalkyl of one to ten carbon atoms, wherein one or more of the fluorine atoms may be substituted by a halogen atom or other than fluorine, provided that R 1 and R 2 together are not F, wherein n is an integer from 2 to 1000.
Claim 7
Dependent Claim
77 words
A perhalogenated polyether having an average formula: ##STR28## wherein X and Z are the same or different and are selected from the group consisting of --(CF 2 O r COF, --(CF 2 ) r OCF 3 , --(CF 2 ) r COOH and --C r F 2r+1-q Cl q , wherein r is an integer from 1 to 12 and q is an integer rom 0 to 25, and wherein n is an integer greater than 20.
Claim 8
Dependent Claim
77 words
A perhalogenated polyether having an average formula: ##STR28## wherein X and Z are the same or different and are selected from the group consisting of --(CF 2 O r COF, --(CF 2 ) r OCF 3 , --(CF 2 ) r COOH and --C r F 2r+1-q Cl q , wherein r is an integer from 1 to 12 and q is an integer rom 0 to 25, and wherein n is an integer greater than 20.
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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) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |