US4515981A
Expired / Lapsed
US
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Polyetherpolyol derivative and process for preparing the same
Assignee: Toyo Tire Corp
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Filing: 1983-09-20
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Granted: 1985-05-07
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Expires: 2003-09-20
Abstract
Abstract A polyetherpolyol derivative having at least, on average, one terminal amino group in which at least, on average, one hydroxyl group is substituted by a residue of para-aminobenzoic acid ester, and having the general formula ##STR1## wherein n is an integer of 2 to 8, x is an average value and a positive number of 0.05n to (n-1), A is an n-valent radical obtained by removal of hydroxyl groups from an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000.
Inventors
- 👤 Kozo Otani
- 👤 Yoshio Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; C08G18/5027; C08G18/5033; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33396
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A polyetherpolyol derivative having at least one terminal amino group in which at least one hydroxyl group is substituted by a residue of para-aminobenzoic acid ester, and having the formula ##STR3## wherein n is an integer of 2 to 8, x is a positive number of 0.05n to (n-1), A is an n-valent radical obtained by removal of hydroxyl groups from an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000.
Claim 2
Dependent Claim
72 words
A polyetherpolyol derivative having at least one terminal amino group in which at least one hydroxyl group is substituted by a residue of para-aminobenzoic acid ester, and having the formula ##STR3## wherein n is an integer of 2 to 8, x is a positive number of 0.05n to (n-1), A is an n-valent radical obtained by removal of hydroxyl groups from an n-valent polyoxyalkylenepolyol having a molecular weight of 400 to 10,000.
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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |