US4520139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pectin and related carbohydrates for the preparation of polyurethane foams
Assignee: Individual
•
Filing: 1984-07-26
•
Granted: 1985-05-28
•
Expires: 2004-07-26
Abstract
Abstract Gel forming polysaccharides such as pectin react with polyisocyanates to form useful polyurethane foams.
Inventors
- 👤 Richard B. Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:18
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0025; C08G2110/0041; C08G2110/0083
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
25 words
A polyurethane foam made by reacting a composition containing a polyisocyanate, a surfactant, an amine type polyurethane producing catalyst, a gel forming polysaccharide and water.
Claim 2
Dependent Claim
25 words
A polyurethane foam made by reacting a composition containing a polyisocyanate, a surfactant, an amine type polyurethane producing catalyst, a gel forming polysaccharide and water.
Claim 3
Dependent Claim
16 words
A polyurethane foam as in claim 1 wherein the polyssaccharide is guar gum or alginic acid.
Claim 4
Dependent Claim
14 words
A polyurethane foam as in claim 1 or 2 additionally containing a flame retardant.
Claim 5
Dependent Claim
22 words
A polyurethane foam made by reacting a composition containing a polyisocyanate, a surfactant, an amine type polyurethane producing catalyst, pectin and water.
Claim 6
Dependent Claim
22 words
A polyurethane foam made by reacting a composition containing a polyisocyanate, a surfactant, an amine type polyurethane producing catalyst, pectin and water.
Claim 7
Dependent Claim
11 words
A polyurethane foam as in claim 4 containing a flame retardant.
Claim 8
Dependent Claim
13 words
A polyurethane foam as in claims 4 or 5 additionally containing a carbohydrate.
Claim 9
Dependent Claim
24 words
A polyurethane foam as in claims 4 or 5 additionally containing an untreated carbohydrate in which substantially all of the hydroxyl groups are free.
Claim 10
Dependent Claim
26 words
A polyurethane foam as in claim 5 wherein the carbohydrate is selected from the group consisting of corn starch, cellulose, corn syrup, dextrose, fructose and sucrose.
Claim 11
Dependent Claim
14 words
A polyurethane foam as in claim 4 or 5 additionally containing an industrial polyol.
Claim 12
Dependent Claim
22 words
A polyurethane foam as in claim 9 additionally containing an untreated carbohydrate in which substantially all of the hydroxyl groups are free.
Claim 13
Dependent Claim
25 words
A polyurethane foam as in claim 10 wherein the carbohydrate is selected from the group consisting of cornstarch, cellulose, corn syrup, dextrose, fructose and sucrose.
Claim 14
Dependent Claim
25 words
A composition useful for the preparation of polyurethane foams comprising a surfactant, an amine type polyurethane foam producing catalyst, a gel forming polysaccharide and water.
Claim 15
Dependent Claim
25 words
A composition useful for the preparation of polyurethane foams comprising a surfactant, an amine type polyurethane foam producing catalyst, a gel forming polysaccharide and water.
Claim 16
Dependent Claim
15 words
A composition as in claim 12 wherein the polysaccharide is guar gum or alginic acid.
Claim 17
Dependent Claim
13 words
A composition as in claim 12 or 13 additionally containing a flame retardant.
Claim 18
Dependent Claim
31 words
A composition useful for the preparation of polyurethane foams comprising a surfactant, an amine type polyurethane foam producing catalyst, pectin and water the pH of the composition being at least 9.
Claim 19
Dependent Claim
31 words
A composition useful for the preparation of polyurethane foams comprising a surfactant, an amine type polyurethane foam producing catalyst, pectin and water the pH of the composition being at least 9.
Claim 20
Dependent Claim
11 words
A composition as in claim 15 additionally containing a flame retardant.
Claim 21
Dependent Claim
12 words
A composition as in claims 15 or 16 additionally containing a carbohydrate.
Claim 22
Dependent Claim
23 words
A composition as in claim 15 or 16 additionally containing an untreated carbohydrate in which substantially all of the hydroxyl groups are free.
Claim 23
Dependent Claim
23 words
A composition as in claim 18 wherein the carbohydrate is selected from the group consisting of cornstarch, cellulose, corn syrup, dextrose and sucrose.
Claim 24
Dependent Claim
12 words
A composition as in 15 and 16 additionally containing an industrial polyol.
Claim 25
Dependent Claim
12 words
A composition as in 15 and 16 additionally containing an industrial polyol.
Claim 26
Dependent Claim
21 words
A composition as in claim 20 additionally containing an untreated carbohydrate in which substantially all of the hydroxyl groups are free.
Claim 27
Dependent Claim
24 words
A composition as in claim 21 wherein the carbohydrate is selected from the group consisting of cornstarch, cellulose, corn syrup, dextrose, fructose and sucrose.
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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |