US4468501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked polyphenylene oxide
Assignee: Permea Inc
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Filing: 1983-06-30
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Granted: 1984-08-28
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Expires: 2003-06-30
Abstract
Abstract Cross-linked polyphenylene oxide compositions comprise the reaction product of an alkyl halogenated phenylene oxide polymer and ammonia. The cross-linkage between phenylene groups is benzyl amine linkage represented by the structural formula --CH 2 NHCH 2 --. The cross-linked polyphenylene oxide is useful as a membrane.
Inventors
- 👤 Anthony Zampini
- 👤 Raymond F. Malon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:13
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; B; B01; B01D; B01D71/00; B01D71/06; B01D71/52; B01D71/522; B01D71/5223
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of an alkyl halogenated phenylene oxide polymer and ammonia, wherein cross-linkage between phenylene groups is represented by the structural formula --CHRNHCHR--, where R is hydrogen or an alkyl.
Claim 2
Dependent Claim
38 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of an alkyl halogenated phenylene oxide polymer and ammonia, wherein cross-linkage between phenylene groups is represented by the structural formula --CHRNHCHR--, where R is hydrogen or an alkyl.
Claim 3
Dependent Claim
43 words
The composition of claim 1 wherein the phenylene oxide polymer has at least one alkyl group having 1 to 3 carbon atoms, said alkyl groups being in an ortho position on the phenylene ring with respect to the oxygen of the phenylene oxide.
Claim 4
Dependent Claim
19 words
The composition of claim 2 wherein said at least one alkyl group is halogenated at the benzylic carbon atom.
Claim 5
Dependent Claim
13 words
The composition of claim 3 wherein the phenylene oxide has two methyl groups.
Claim 6
Dependent Claim
15 words
The composition of claim 4 wherein the methyl groups are halogenated with chlorine or bromine.
Claim 7
Dependent Claim
48 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of brominated poly(2,6-dimethyl-1,4-phenylene oxide) and ammonia wherein there are from 0.1 to 2.0 benzylic bromine atoms per phenylene oxide unit, wherein thereis benzyl amine cross-linkage between phenylene groups represented by the structural formula --CH 2 NHCH 2 --.
Claim 8
Dependent Claim
48 words
A cross-linked phenylene oxide polymer composition comprising the reaction product of brominated poly(2,6-dimethyl-1,4-phenylene oxide) and ammonia wherein there are from 0.1 to 2.0 benzylic bromine atoms per phenylene oxide unit, wherein thereis benzyl amine cross-linkage between phenylene groups represented by the structural formula --CH 2 NHCH 2 --.
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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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |