Multi-level active filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jul 29, 2008
Grant Date -
May 17, 2007
app pub date -
May 16, 2006
filing date -
May 17, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-phase active filter includes a group of power cells electrically connected in a three-phase configuration, a precharging circuit, and a controller that controls the voltage delivered to the plurality of power cells. Each power cell includes an inverter having a pair of direct current (DC) terminals, at least one capacitor electrically connected in parallel with the inverter, and an energy dissipating circuit that is electrically connected in parallel with the inverter. The energy dissipating circuit of each power cell self-regulates DC voltage within the cell.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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SIEMENS ENERGY & AUTOMATION INC | 3333 OLD MILTON PARKWAY ALPHARETTA GA 30202 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Hammond, Peter | Greensburg, PA | 26 | 379 |
# of filed Patents : 26 Total Citations : 379 | |||
Rastogi, Mukul | Monroeville, PA | 23 | 545 |
# of filed Patents : 23 Total Citations : 545 | |||
Simms, Stan | Delmont, PA | 2 | 14 |
# of filed Patents : 2 Total Citations : 14 |
Cited Art Landscape
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Patent Citation Ranking
- 3 Citation Count
- H02J Class
- 3.87 % this patent is cited more than
- 17 Age
Forward Cite Landscape
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

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Feb 09, 2023 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, MICRO ENTITY (ORIGINAL EVENT CODE: M3552); ENTITY STATUS OF PATENT OWNER: MICROENTITY year of fee payment: 8 |
Jan 20, 2023 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CQ INNOVATIONS, LLC;REEL/FRAME:062453/0001 Owner name: CLAY, JAMES, CALIFORNIA Effective Date: Jan 20, 2023 |
Jan 10, 2019 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, MICRO ENTITY (ORIGINAL EVENT CODE: M3551); ENTITY STATUS OF PATENT OWNER: MICROENTITY year of fee payment: 4 |
Aug 25, 2015 | I | Issuance | |
Aug 05, 2015 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Jul 01, 2015 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CQ INNOVATIONS;REEL/FRAME:036146/0799 Owner name: CQ INNOVATIONS, LLC, CALIFORNIA Effective Date: Jul 01, 2015 |
Oct 16, 2014 | P | Published | |
Apr 15, 2014 | F | Filing | |
Apr 15, 2014 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CLAY, JAMES;QUILES, JESSE;REEL/FRAME:033233/0184 Owner name: CQ INNOVATIONS, CALIFORNIA Effective Date: Apr 15, 2014 |
Apr 15, 2013 | PD | Priority Date |

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