US4794153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyanhydride-siloxanes and polyimide-siloxanes obtained therefrom
Assignee: General Electric Co
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Filing: 1987-11-16
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Granted: 1988-12-27
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Expires: 2007-11-16
Abstract
Abstract Polyimide-siloxanes are provided resulting from the intercondensation of organic diamines with organosiloxanes having terminal silyl-substituted aromatic organic anhydride groups.
Inventors
- 👤 Jonathan D. Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:22
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/106; C08G77/00; C08G77/04; C08G77/14; C08G77/42; C08G77/452; C08G77/455; C08G77/48; C08G77/54; H01B3/46
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
84 words
Polyanhydride siloxane having from about 5 to about 2000 chemically combined units comprising a mixture of silylanhydride units of the formula ##STR23## and organosiloxane units of the formula ##STR24## where R is selected from the class consisting of C.sub.(1-14) monovalent hydrocarbon radicals and monovalent C.sub.(1-14) hydrocarbon radicals substituted with radicals neutral during intercondensation, R 1 is a C.sub.(6-14) trivalent aromatic organic radical, c is a whole number equal to 0 to 2 inclusive and d is an interger equal to 1 to 3 inclusive.
Claim 2
Dependent Claim
84 words
Polyanhydride siloxane having from about 5 to about 2000 chemically combined units comprising a mixture of silylanhydride units of the formula ##STR23## and organosiloxane units of the formula ##STR24## where R is selected from the class consisting of C.sub.(1-14) monovalent hydrocarbon radicals and monovalent C.sub.(1-14) hydrocarbon radicals substituted with radicals neutral during intercondensation, R 1 is a C.sub.(6-14) trivalent aromatic organic radical, c is a whole number equal to 0 to 2 inclusive and d is an interger equal to 1 to 3 inclusive.
Claim 3
Dependent Claim
18 words
A polyanhydride-siloxane in accordance with claim 1, where R is CH 3 -- and R 1 is ##STR25##
Claim 4
Dependent Claim
5 words
Polyanhydride-siloxane having the formula ##STR26##
Claim 5
Dependent Claim
5 words
Polyanhydride-siloxane having the formula ##STR26##
Claim 6
Dependent Claim
63 words
Polyanhydride siloxane comprising chemically combined anhydride siloxane units of the formula ##STR27## where R is a member selected from the class consisting of C.sub.(1-14) monovalent hydrocarbon radicals and C.sub.(1-14) monovalent hydrocarbon radicals and C.sub.(1-14) monovalent hydrocarbon radicals substituted with radicals neutral during intercondensation, R 1 is a C.sub.(6-14) trivalent aromatic organic radical, and e is a whole number equal to 0 or 1.
Claim 7
Dependent Claim
63 words
Polyanhydride siloxane comprising chemically combined anhydride siloxane units of the formula ##STR27## where R is a member selected from the class consisting of C.sub.(1-14) monovalent hydrocarbon radicals and C.sub.(1-14) monovalent hydrocarbon radicals and C.sub.(1-14) monovalent hydrocarbon radicals substituted with radicals neutral during intercondensation, R 1 is a C.sub.(6-14) trivalent aromatic organic radical, and e is a whole number equal to 0 or 1.
Claim 8
Dependent Claim
24 words
Polyanhydride siloxane in accordance with claim 4 having the formula, ##STR28## where n is an integer having a value of up to 2000 inclusive.
Claim 9
Dependent Claim
49 words
Polyanhydride siloxane in accordance with claim 4, having the formula ##STR29## where R is a member selected from the class consisting of C.sub.(1-14) monovalent hydrocarbon radicals and C.sub.(1-14) monovalent hydrocarbon substituted with radicals neutral during intercondensation and n is an integer having a value of up to 2000 inclusive.
Claim 10
Dependent Claim
39 words
Polyanhydride siloxane in accordance with claim 4 comprising chemically combined units of the formula ##STR30## where R is a C.sub.(1-14) monovalent hydrocarbon radical or a C.sub.(1-14) monovalent hydrocarbon radical substituted with the same or different radicals neutral during intercondensation.
Claim 11
Dependent Claim
73 words
Polyahydride siloxane comprising anhydride siloxane units of the formula, ##STR31## chemically combined with organosiloxane units of the formula ##EQU1## where R is a C.sub.(1-14) monovalent hydrocarbon radical or a C.sub.(1-14) monovalent hydrocarbon radical substituted with the same or different radicals neutral during intercondensation, R 1 is a C.sub.(6-14) trivalent aromatic organic radical, f is a whole number equal to 0 or 1 and g is an integer equal to 1 to 3 inclusive.
Claim 12
Dependent Claim
73 words
Polyahydride siloxane comprising anhydride siloxane units of the formula, ##STR31## chemically combined with organosiloxane units of the formula ##EQU1## where R is a C.sub.(1-14) monovalent hydrocarbon radical or a C.sub.(1-14) monovalent hydrocarbon radical substituted with the same or different radicals neutral during intercondensation, R 1 is a C.sub.(6-14) trivalent aromatic organic radical, f is a whole number equal to 0 or 1 and g is an integer equal to 1 to 3 inclusive.
Claim 13
Dependent Claim
11 words
Polyanhydride siloxane in accordance with claim 8 where R is methyl.
Claim 14
Dependent Claim
10 words
Silylanhydride siloxane comprising chemically combined units of the formula, ##STR32##
Claim 15
Dependent Claim
10 words
Silylanhydride siloxane comprising chemically combined units of the formula, ##STR32##
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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) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |