Description
Class E21B : EARTH OR ROCK DRILLING
Subclass 1/12: Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence)
E21B 1/12
Sub-Class
Stats
- 10 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- 7 Total Patent Owners
- 30 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11959338 | Multi-tool boring systems and methods of operating such systems | Sep 06, 23 | Apr 16, 24 | ArcByt, Inc. |
| 11028643 | Down the hole drilling machine and method for drilling rock | May 31, 18 | Jun 08, 21 | Sandvik Intellectual Property AB |
| 10385617 | High frequency fluid driven drill hammer percussion drilling in hard formations | Aug 17, 12 | Aug 20, 19 | Hammergy AS |
| 9709768 | Optical connector | Dec 16, 14 | Jul 18, 17 | STATOIL PETROLEUM AS |
| 8360155 | Equalizer stopple fitting with integral pressure equalization fitting | Sep 05, 08 | Jan 29, 13 | OIL STATES INDUSTRIES, INC., QUALITY CONNECTOR SYSTEMS, |
| 7841424 | Power output mechanism for power tools | May 08, 08 | Nov 30, 10 | Power Network Industry Co., Ltd. |
| 7677329 | Method and device for controlling drilling fluid pressure | Nov 24, 04 | Mar 16, 10 | ENHANCED DRILLING AS |
| 6439318 | Downhole apparatus | Jun 27, 00 | Aug 27, 02 | NATIONAL OILWELL DHT, L.P. |
| 6315063 | Reciprocating rotary drilling motor | Nov 02, 99 | Nov 13, 01 | Not available |
| 6138775 | Boring machine | Jun 11, 98 | Oct 31, 00 | TRACTO-TECHNIK PAUL SCHMIDT SPEZIALMASCHINEN |
Recent Publications
Not Available
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 34 Months (last 2 years Issuances)
- 34 Months (last 5 years Issuances)