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Patent US4650609A successfully refreshed from Google Patents.
US4650609A
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Tetraphosphinylquinodimethanes
Assignee: EIDP Inc
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Filing: 1985-06-25
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Granted: 1987-03-17
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Expires: 2005-06-25
Abstract
Abstract Compounds having a quinodimethane or a 7,8-dihydroquinodimethane nucleus and four substituted phosphinyl groups at the 7- and 8-positions are disclosed. A process for preparing the specified compounds is also disclosed.
Inventors
- 👤 David R. Brittelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:49
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4071; C07F9/409; C07F9/3804; C07F9/3839; C07F9/3843; C07F9/4003; C07F9/4025; C07F9/4056; C07F9/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
183 words
A compound of the formula ##STR16## R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are individually selected from the group consisting of --F, --Cl, --OH, --OSi(CH 3 ) 3 , and --OC z H 2z+1 ; and, taken in combination, R 1 and R 2 , R 3 and R 4 , R 5 and R 6 , and R 7 and R 8 are individually selected from the group consisting of --O(CH 2 ) 2 O-- and --O(CH 2 ) 3 O--; provided that, where any two members of R 1 through R 8 which are attached to the same phosphorus atom are different, said members are --OC z H 2z+1 ; M is Li, Na, K, Rb; m is 0 or 1; provided that, where A is ##STR17## m is 0; n is 0 where m is 1, 2 where m is 0 and A is ##STR18## and 0 or 1 where A is ##STR19## and z is an integer from 2 to 8, inclusive.
Claim 2
Dependent Claim
183 words
A compound of the formula ##STR16## R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are individually selected from the group consisting of --F, --Cl, --OH, --OSi(CH 3 ) 3 , and --OC z H 2z+1 ; and, taken in combination, R 1 and R 2 , R 3 and R 4 , R 5 and R 6 , and R 7 and R 8 are individually selected from the group consisting of --O(CH 2 ) 2 O-- and --O(CH 2 ) 3 O--; provided that, where any two members of R 1 through R 8 which are attached to the same phosphorus atom are different, said members are --OC z H 2z+1 ; M is Li, Na, K, Rb; m is 0 or 1; provided that, where A is ##STR17## m is 0; n is 0 where m is 1, 2 where m is 0 and A is ##STR18## and 0 or 1 where A is ##STR19## and z is an integer from 2 to 8, inclusive.
Claim 3
Dependent Claim
35 words
A compound as described in claim 1, wherein R 1 and R 2 , R 3 and R 4 , R 5 and R 6 , and R 7 and R 8 are the same.
Claim 4
Dependent Claim
35 words
A compound as described in claim 1, wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are the same.
Claim 5
Dependent Claim
42 words
A compound as described in claim 3, wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are alkoxy groups having from 2 to 8 carbon atoms.
Claim 6
Dependent Claim
34 words
A compound as described in claim 4, wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are ethoxy.
Claim 7
Dependent Claim
11 words
A compound as described in claim 5, wherein M is Li.
Claim 8
Dependent Claim
11 words
A compound as described in claim 6, wherein m is 0.
Claim 9
Dependent Claim
11 words
A compound as described in claim 7, wherein n is 1.
References Cited (Backward Citations)
US4444930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |