Sunstone Corporation
Oklahoma City, OK, US· latest recorded location
Sunstone Corporation is named on 12 US grants and 11 published applications in this corpus. Its most frequent classification is E21B (Earth or rock drilling).
- Granted patents
- 12
- Published applications
- 11
- Inventors
- 12
- Granted in 2026 so far
- 0
- Most recent grant
- 4 Oct 2011
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 2 |
| 2005 | 2 | 2 |
| 2006 | 1 | 2 |
| 2007 | 1 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 2 | 0 |
By publication year.
Technology areas
Share of 23 documents
Recent patents
- Force balanced rotating pressure control device4 Oct 2011US 8,028,750 B2
- Producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance19 Jul 2011US 7,981,379 B2
- Flapper valve and actuator26 May 2009US 7,537,062 B2
- Method for producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance23 Dec 2008US 7,468,173 B2
- Rotating pressure control head3 Jun 2008US 7,380,590 B2
- Force Balanced Rotating Pressure Control Device12 Aug 2010US 2010/0200213 A1
- Method for producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance5 Mar 2009US 2009/0060801 A1
- Flapper Valve and Actuator14 Feb 2008US 2008/0035353 A1
- Underground treatment of biowaste6 Apr 2006US 2006/0074269 A1
- Rotating pressure control head23 Feb 2006US 2006/0037744 A1
Most cited
By later US patents
- Tubing containing electrical wiring insert123US 6,666,274 B22003
- Method for producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance68US 7,468,173 B22008
- Phosphors and methods of preparing the same46US 4,857,228 A1989
- Rotating pressure control head44US 7,380,590 B22008
- Method and apparatus for inducing under balanced drilling conditions using an injection tool attached to a concentric string of casing23US 6,769,498 B22004