US3622577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trimerization of organic isocyanates
Assignee: EIDP Inc
•
Filing: 1968-11-08
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Granted: 1971-11-23
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Expires: 1988-11-08
Abstract
Abstract A process for trimerizing organic isocyanates by mixing said isocyanates with a complex of a basic alkali metal salt and a macrocyclic polyether.
Inventors
- 👤 Charles John Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:06
CPC Classifications
C; C07; C07D; C07D323/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
12 words
A process of claim 1 wherein the macrocyclic polyether has the formula
Claim 2
Dependent Claim
24 words
A process of claim 2 wherein the basic alkali metal salt is a sodium or potassium hydroxide, amide, acetate, 2-ethyl hexanoate, cyanide or phenolate.
Claim 3
Dependent Claim
15 words
A process of claim 2 wherein the basic alkali metal salt is a potassium phenolate.
Claim 4
Dependent Claim
12 words
A process of claim 2 wherein the macrocyclic polyether has the formula
Claim 5
Dependent Claim
24 words
A process of claim 5 wherein the basic alkali metal salt is a sodium or potassium hydroxide, amide, acetate, 2-ethyl hexanoate, cyanide or phenolate.
Claim 6
Dependent Claim
13 words
A process of claim 2 wherein the said macrocyclic polyether has the formula
Claim 7
Dependent Claim
24 words
A process of claim 7 wherein the basic alkali metal salt is a sodium or potassium hydroxide, amide, acetate, 2-ethyl hexanoate, cyanide or phenolate.
Claim 8
Dependent Claim
12 words
A process of claim 2 wherein said macrocyclic polyether has the formula
Claim 9
Dependent Claim
23 words
A process of claim 9 wherein the alkali metal salt is a sodium or potassium hydroxide, amide, acetate, 2-ethyl hexanoate, cyanide or phenolaTe.
Claim 10
Dependent Claim
14 words
A process of claim 9 wherein the basic alkali metal is a potassium phenolate.
Claim 11
Dependent Claim
30 words
A process of claim 9 wherein the macrocyclic polyether is 2, 3,11,12-dibenzo-1,4,7,10,13,16-hexoxacyclooctadeca-2,11-diene and the basic alkali metal salt is sodium or potassium hydroxide, amide, acetate, 2-ethyl hexanoate, cyanide or phenolate.
Claim 12
Dependent Claim
13 words
A process of claim 12 wherein the organic isocyanate is a tolylene diisocyanate.
Claim 13
Dependent Claim
12 words
A process of claim 2 wherein the macrocyclic polyether has the formula
Claim 14
Dependent Claim
24 words
A process of claim 14 wherein the basic alkali metal salt is a sodium or potassium hydroxide, amide, acetate, 2-ethyl hexanoate, cyanide or phenolate.
Claim 15
Dependent Claim
12 words
A process of claim 15 wherein the isocyanate is a tolylene diisocyanate.
References Cited (Backward Citations)
US3330828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |