|
US5166115A
|
Polyurethanes |
Expired / Lapsed
|
1992-02-03 |
1992-11-24 |
2 |
Details
|
|
US5143942A
|
Polyurethanes |
Expired / Lapsed
|
1991-10-28 |
1992-09-01 |
2 |
Details
|
|
US4786656A
|
Polyhydroxyalkane/aromatic diamine chain extenders |
Expired / Lapsed
|
1988-02-22 |
1988-11-22 |
27 |
Details
|
|
US4631298A
|
Mixed diamine chain extender |
Expired / Lapsed
|
1985-12-16 |
1986-12-23 |
37 |
Details
|
|
US4347381A
|
Method of treating long chain alkyl amines or products deri… |
Expired / Lapsed
|
1978-01-24 |
1982-08-31 |
9 |
Details
|