Fluid sampling apparatus
USRE34754E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | May 9, 1988 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | May 9, 2008 |
Classification
- Technology area (CPC —)General
Abstract
A fluid sampling apparatus is disclosed for withdrawing samples of groundwater or other fluids from a well or other monitoring site. The apparatus preferably includes pump means, conduit means and a wellhead assembly that are substantially permanently installed at such well or monitoring site and are thereby dedicated thereto in order to avoid or minimize cross-contamination of samples from site to site. The apparatus preferably also includes a removable and portable controller means adapted for easy and convenient transportation and connection to such dedicated fluid sampling components at various wells or monitoring sites. The questions raised in reexamination request No. 90/001,494, filed Apr. 18, 1988, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CRF 1.570(e).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.