Bollfrass; Charles A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Bollfrass; Charles A..The latest application filed is for "interstitially insulated pipes and connection technologies".
- Bollfrass; Charles A. - Spring TX
- Bollfrass; Charles A. - Houston TX
| Patent | Date |
|---|---|
| Interstitially Insulated Pipes and Connection Technologies App 20090320953 - Fletcher; Leroy S. ; et al. | 2009-12-31 |
| Systems and methods for allowing underwater escape from a submarine Grant 6,925,954 - Van Acker, Jr. , et al. August 9, 2 | 2005-08-09 |
| Method and apparatus for forming a ventable seal Grant 5,029,906 - Chelette , et al. July 9, 1 | 1991-07-09 |
| Elastomeric guard seal for tubular connections Grant 4,928,999 - Landriault , et al. May 29, 1 | 1990-05-29 |
| Tubular coupling with ventable seal Grant 4,893,844 - Chelette , et al. January 16, 1 | 1990-01-16 |
| Threaded pipe connection Grant 4,588,213 - Bollfrass , et al. May 13, 1 | 1986-05-13 |
| Threaded connector Grant 4,373,754 - Bollfrass , et al. February 15, 1 | 1983-02-15 |
| Treating, including induction heating of well pipe connections Grant 4,133,095 - Lewis , et al. January 9, 1 | 1979-01-09 |
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