|
|
|
|
|
Legal status
Patent lapsed (non-payment of fees)
| (51) | INT.CL.: (2006.01) |
C08G 69/00 |
| (11) | Number of the document | 3267 |
| (13) | Kind of document | B |
| (21) | Application number | IP357 |
| (22) | Date of filing the application | 1993-02-25 |
| (41) | Date of publication of the application | 1994-09-25 |
| (45) | Date of publication of patent | 1995-05-25 |
| (30) | Number | Date | Country code |
| 262936 | 1988-10-20 | US | |
| PCT/US89/03464 | 1989-08-17 | WO | |
| 4895302 | 1991-04-19 | SU |
| (71) |
E.I. Du Pont de Nemours and Company,
1007 Market Street, Wilmington, Delaware 19898,
US
|
| (72) |
Robert Clayton WHELAND, US
|
| (73) |
E.I. Du Pont de Nemours and Company,
1007 Market Street, Wilmington, Delaware 19898,
US
|
| (74) |
Liudmila GERASIMOVIČ,
IĮ "Liudmila Gerasimovič, Patentinis patikėtinis", Vingrių g. 13-42, LT-01141 Vilnius,
LT
|
| (54) | PROCESS FOR INCREASING THE MOLECULAR WEIGHT OF POLYAMIDE |
| Payment date | Validity (years) | Amount | |
| 1995-02-23 | 3 | 70.00 USD |
| Patent lapsed (non-payment of fees) | ||
| Invalidation date | 1996-02-25 |