Patent US4556704A successfully refreshed from Google Patents.
US4556704A
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Composition
Assignee: General Electric Co
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Filing: 1984-10-17
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Granted: 1985-12-03
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Expires: 2004-10-17
Abstract
Abstract A composition comprising an end-capped aromatic carbonate polymer wherein the end-cap is of the structure ##STR1## wherein R is ##STR2## wherein R 1 and R 2 are the same or different and are alkyl of one to six carbon atoms, inclusive; cycloalkyl of four to seven carbon atoms, inclusive; phenyl; one to three alkyl substituted phenyl each alkyl having one to three carbon atoms, inclusive; and R 1 and R 2 taken together with the nitrogen to which they are attached form a ring of four to six carbon atoms; and wherein R 3 is alkyl of one to ten carbon atoms, inclusive; or cycloalkyl of four to eight carbon atoms, inclusive.
Inventors
- 👤 Niles R. Rosenquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:18
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A composition comprising an end-capped aromatic carbonate polymer wherein the end-cap is of the structure ##STR7## wherein R is ##STR8## wherein R 1 and R 2 are the same or different and are alkyl of one to six carbon atoms, inclusive; cycloalkyl of four to seven carbon atoms, inclusive; phenyl; one to three alkyl substituted phenyl each alkyl having one to three carbon atoms, inclusive; or R 1 and R 2 taken together with the nitrogen to which they are attached form a ring of four to six carbon atoms; and wherein R 3 is alkyl of one to ten carbon atoms, inclusive; or cycloalkyl of four to eight carbon atoms, inclusive.
Claim 2
Dependent Claim
112 words
A composition comprising an end-capped aromatic carbonate polymer wherein the end-cap is of the structure ##STR7## wherein R is ##STR8## wherein R 1 and R 2 are the same or different and are alkyl of one to six carbon atoms, inclusive; cycloalkyl of four to seven carbon atoms, inclusive; phenyl; one to three alkyl substituted phenyl each alkyl having one to three carbon atoms, inclusive; or R 1 and R 2 taken together with the nitrogen to which they are attached form a ring of four to six carbon atoms; and wherein R 3 is alkyl of one to ten carbon atoms, inclusive; or cycloalkyl of four to eight carbon atoms, inclusive.
Claim 3
Dependent Claim
9 words
The composition in accordance with claim 1 wherein ##STR9##
Claim 4
Dependent Claim
11 words
The composition in accordance with claim 1 wherein R is ##STR10##
Claim 5
Dependent Claim
15 words
The composition in accordance with claim 3 wherein R 1 and R 2 are phenyl.
Claim 6
Dependent Claim
12 words
The composition in accordance with claim 3 wherein R 1 is phenyl.
Claim 7
Dependent Claim
20 words
The composition in accordance with claim 3 wherein R 1 is branched alkyl of three to six carbon atoms, inclusive.
Claim 8
Dependent Claim
19 words
The composition in accordance with claim 3 wherein R 1 is cycloalkyl of four to seven carbon atoms, inclusive.
Claim 9
Dependent Claim
29 words
The composition in accordance with claim 2 wherein R 3 is branched alkyl of four to ten carbon atoms, inclusive, or cycloalkyl of four to eight carbon atoms, inclusive.
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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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |