| Event Date | Event Description |
| Monday, January 4, 1993 | ABANDONMENT - FAILURE TO RESPOND OR LATE RESPONSE |
| Tuesday, April 14, 1992 | NON-FINAL ACTION MAILED |
| Tuesday, March 10, 1992 | ASSIGNED TO EXAMINER |
| Monday, March 9, 1992 | DIVISIONAL PROCESSING COMPLETE |
| Thursday, August 8, 1991 | DIVISIONAL REQUEST RECEIVED |
| Thursday, August 8, 1991 | DIVISIONAL REQUEST RECEIVED |
| Thursday, August 8, 1991 | DIVISIONAL REQUEST RECEIVED |
| Thursday, August 8, 1991 | DIVISIONAL REQUEST RECEIVED |
| Thursday, August 8, 1991 | DIVISIONAL REQUEST RECEIVED |
| Thursday, August 8, 1991 | DIVISIONAL REQUEST RECEIVED |
| Thursday, August 8, 1991 | DIVISIONAL REQUEST RECEIVED |
| Friday, October 4, 1991 | EXAMINER'S AMENDMENT MAILED |
| Wednesday, October 2, 1991 | PREVIOUS ALLOWANCE COUNT WITHDRAWN |
| Thursday, August 8, 1991 | DIVISIONAL REQUEST RECEIVED |
| Monday, August 26, 1991 | APPROVED FOR PUB - PRINCIPAL REGISTER |
| Thursday, August 15, 1991 | EXAMINER'S AMENDMENT MAILED |
| Thursday, June 6, 1991 | CORRESPONDENCE RECEIVED IN LAW OFFICE |
| Friday, January 11, 1991 | NON-FINAL ACTION MAILED |
| Tuesday, December 4, 1990 | ASSIGNED TO EXAMINER |