US4658049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxyl group-containing siloxane compound
Assignee: JNC Corp
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Filing: 1985-12-12
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Granted: 1987-04-14
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Expires: 2005-12-12
Abstract
Abstract A novel carboxyl group-containing siloxane compound, whether its molecular weight is low or high, having a superior heat stability, and useful as emulsifying agent, surface modifier for inorganic materials, etc. is provided, which compound is expressed by the general formula ##STR1## wherein R represents an alkyl group of 1 to 4 carbon atoms; R 1 represents R or R 2 ; R 2 represents CH 2 CH 2 CH 2 --OCH 2 CH 2 ) n COOH; n is an integer of 1 or more; l is an integer of 0 or more; m is an integer of 0 or more; l+m is an integer of 1 or more; and R 1 represents R 2 in the case of m=0.
Inventors
- 👤 Takaharu Nakano
- 👤 Nobumasa Ohtake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:31
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1896; C07F7/0834; C07F7/0838; C08; C08G; C08G77/00; C08G77/04; C08G77/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A carboxyl group-containing siloxane compound expressed by the general formula ##STR12## wherein R represents an alkyl group of 1 to 4 carbon atoms; R 1 represents R or R 2 ; R 2 represents CH 2 CH 2 CH 2 --OCH 2 CH 2 ) n COOH; n is an integer of 1 to several ten thousands, l is an integer of from 0 to 134; m is an integer of from 0 to 20; l+m is an integer of from 1 to 134; and R 1 represents R 2 when m=0.
Claim 2
Dependent Claim
92 words
A carboxyl group-containing siloxane compound expressed by the general formula ##STR12## wherein R represents an alkyl group of 1 to 4 carbon atoms; R 1 represents R or R 2 ; R 2 represents CH 2 CH 2 CH 2 --OCH 2 CH 2 ) n COOH; n is an integer of 1 to several ten thousands, l is an integer of from 0 to 134; m is an integer of from 0 to 20; l+m is an integer of from 1 to 134; and R 1 represents R 2 when m=0.
Claim 3
Dependent Claim
16 words
A compound according to claim 1 wherein said n is an integer of 1 to 10,000.
Claim 4
Dependent Claim
16 words
A compound according to claim 1 wherein said n is an integer of 1 to 1,000.
Claim 5
Dependent Claim
16 words
A compound according to claim 1 having a number average molecular weight of 7,800 or less.
Claim 6
Dependent Claim
16 words
A compound according to claim 1 having a number average molecular weight of 1,000 or less.
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) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |