US4845158A
Expired / Lapsed
US
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Telechelic polyisobutylene and block copolymer derivatives
Assignee: General Electric Co
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Filing: 1987-08-10
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Granted: 1989-07-04
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Expires: 2007-08-10
Abstract
Abstract Polymers of the formula: ##STR1## wherein X is selected from the group consisting of halogen, hydroxyl and alkoxy and n is an integer such that the polymer has a weight average molecular weight within the range of from 5,000 to 30,000 are useful to prepare a wide variety of block copolymer resins such as polycarbonate-polyisobutylene block copolymer.
Inventors
- 👤 Edward N. Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:31
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08F; C08F293/00; C08F8/00; C08F8/10; C08F8/14; C08F8/50; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/64; C08G64/00; C08G64/18; C08J; C08J5/00; C08J5/18; C08F2810/00; C08F2810/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
46 words
A polymer of the formula: ##STR13## wherein X is selected from the group consisting of halogen, and alkoxy and n is an integer such that the polymer has a weight average molecular weight within the range of from 5,000 to 30,000 determined by gel permeation chromatography.
Claim 2
Dependent Claim
46 words
A polymer of the formula: ##STR13## wherein X is selected from the group consisting of halogen, and alkoxy and n is an integer such that the polymer has a weight average molecular weight within the range of from 5,000 to 30,000 determined by gel permeation chromatography.
Claim 3
Dependent Claim
9 words
The polymer of claim 1 wherein X is halogen.
Claim 4
Dependent Claim
10 words
The polymer of claim 2 wherein the halogen is chlorine.
Claim 5
Dependent Claim
9 words
The polymer of claim 1 wherein X is alkoxy.
Claim 6
Dependent Claim
9 words
The polymer of claim 4 wherein alkoxy is methoxy.
Claim 7
Dependent Claim
21 words
The polymer of claim 1 having a number average molecular weight of about 5,800 to 11,500 determined by gel permeation chromatography.
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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |