Helmer; John C.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Helmer; John C..The latest application filed is for "spiral pumping stage and vacuum pump incorporating such pumping stage".

Company Profile

0.15.2

Helmer; John C. - Eugene OR
Helmer; John C. - Menlo Park CA
Helmer; John C. - Palo Alto CA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Centripetal pumping stage and vacuum pump incorporating such pumping stage Grant 8,152,442 - Helmer , et al. April 10, 2	2012-04-10
Spiral pumping stage and vacuum pump incorporating such pumping stage Grant 8,070,419 - Helmer , et al. December 6, 2	2011-12-06
Centripetal Pumping Stage And Vacuum Pump Incorporating Such Pumping Stage App 20100158667 - Helmer; John C. ; et al.	2010-06-24
Spiral Pumping Stage And Vacuum Pump Incorporating Such Pumping Stage App 20100158672 - Helmer; John C. ; et al.	2010-06-24
Sputtering apparatus with a rotating magnet array having a geometry for specified target erosion profile Grant 6,024,843 - Anderson , et al. February 15, 2	2000-02-15
Collimated deposition apparatus and method Grant 5,635,036 - Demaray , et al. June 3, 1	1997-06-03
Physical vapor deposition employing ion extraction from a plasma Grant 5,482,611 - Helmer , et al. January 9, 1	1996-01-09
Collimated deposition apparatus and method Grant 5,330,628 - Demaray , et al. July 19, 1	1994-07-19
Rotating sputtering apparatus for selected erosion Grant 5,252,194 - Demaray , et al. October 12, 1	1993-10-12
Optical detection system for capillary separation columns Grant 5,235,409 - Burgi , et al. August 10, 1	1993-08-10
Sputtering apparatus with a rotating magnet array having a geometry for specified target erosion profile Grant 4,995,958 - Anderson , et al. February 26, 1	1991-02-26
Inverted re-entrant magnetron ion source Grant 4,774,437 - Helmer , et al. September 27, 1	1988-09-27
Magnetron sputter device having planar and curved targets Grant 4,606,806 - Helmer August 19, 1	1986-08-19
Single-pump multiple stroke proportioning for gradient elution liquid chromatography Grant 4,437,812 - Abu-Shumays , et al. March 20, 1	1984-03-20
Planar Retarding Grid Electron Spectrometer Grant 3,710,103 - Helmer January 9, 1	1973-01-09
Induced Electron Emission Spectrometer Having A Unipotential Sample Chamber Grant 3,596,091 - Helmer , et al. July 27, 1	1971-07-27
Electron Impact Time Of Flight Spectrometer Grant 3,582,648 - Anderson , et al. June 1, 1	1971-06-01

uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.

While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.

All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.