USPTO serial 72314315
PERFHEAL
Reviewed by CopyMark Law Group
Reg. 0888526Status 900
- Filing date
- Status date
- Registration date
- Mar 31, 1970
- Examiner
- —
- Law office
- FILE DESTROYED
What this means
This page summarizes the public USPTO record for this serial number, including owners, goods and services, and prosecution history.
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Owner
Goods and services
| Class | Description | Status | First use |
|---|---|---|---|
| 006 | WELLBORE FLUID ADDITIVES AS BLENDS CONTAINING LIGNOSULFONATES AND SIZED CARBONATES USED TO PREVENT DAMAGE TO PRODUCING ZONES OF OIL, GAS AND WATER WELLS BY INVADING FLUID OR FILTRATE IN THE WORKOVER, COMPLETION, DRILLING, FRACTURING AND PERFORATING OF SUCH WELLS USING FRESH WATER, SEA WATER, OR VARIOUS BRINES | EXPIRED | Aug 7, 1968 |
Related trademarks
CopyMark links this record to cited §2(d) serials, the owner's other marks, Nice classes, similar mark names, and recently changed USPTO applications.
Prosecution history
| Date | Code | Event | What it means |
|---|---|---|---|
| Nov 4, 1992 | EXRG | EXPIRED SEC. 9 | — |