US4556704A
Expired / Lapsed
US
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Composition
Assignee: General Electric Co
•
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 09:14
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.
References Cited (Backward Citations)
US3028365A
Cited
US3275601A
Cited
US3133045A
Cited
US3251806A
Cited
US4448953A
Cited
US4412060A
Cited
US4431793A
Cited
US4446296A
Cited
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 |