$PTEN
Market Cap:
$PTEN SEC Filings
| Filing | Filed On |
|---|---|
| SC 13G | 05 Feb 1999 |
| POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-3 | 01 Dec 1998 |
| FORM 10-Q FOR QUARTER ENDED SEPTEMBER 30, 1998 | 16 Nov 1998 |
| FORM 8-K | 30 Oct 1998 |
| FORM 8-K | 09 Sep 1998 |
| FORM 10-Q FOR QUARTER ENDED JUNE 30, 1998 | 14 Aug 1998 |
| FORM 10-Q FOR QUARTER ENDED MARCH 31, 1998 | 15 May 1998 |
| POST EFFECTIVE AMENDMENT NO. 1 TO FORM S-3 | 12 May 1998 |
| FORM 8-K | 01 May 1998 |
| FORM 8-K | 01 May 1998 |
| DEFINITIVE PROXY STATEMENT | 30 Apr 1998 |
| AMENDMENT NO. 1 TO FORM 8-K | 21 Apr 1998 |
| FORM 10-K FOR YEAR ENDED DECEMBER 31, 1997 | 31 Mar 1998 |
| FORM S-8 | 13 Mar 1998 |
| FORM 8-K | 06 Mar 1998 |
| FORM 8-K | 20 Feb 1998 |
| AMENDMENT TO SCHEDULE 13G | 12 Feb 1998 |
| SC 13G/A | 12 Feb 1998 |
| SC 13G | 05 Feb 1998 |
| FORM 8-K | 03 Feb 1998 |
