Compound engine assembly with coaxial compressor and offset turbine section
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 3, 2018
Issued Date -
N/A
app pub date -
Jul 23, 2015
filing date -
Feb 20, 2015
priority date (Note) -
In Force
status (Latency Note)
![]() |
A preliminary load of PAIR data current through [] has been loaded. Any more recent PAIR data will be loaded within twenty-four hours. |
PAIR data current through []
A preliminary load of cached data will be loaded soon.
Any more recent PAIR data will be loaded within twenty-four hours.
![]() |
Next PAIR Update Scheduled on [ ] |

Importance

US Family Size
|
Non-US Coverage
|
Patent Longevity
|
Forward Citations
|
Abstract
A compound engine assembly having an engine core including at least one internal combustion engine in driving engagement with an engine shaft, a compressor having an outlet in fluid communication with an inlet of the engine core and including at least one rotor rotatable about an axis coaxial with the engine shaft, the engine shaft in driving engagement with the compressor rotor, and a turbine section having an inlet in fluid communication with an outlet of the engine core and including at least one rotor engaged on a rotatable turbine shaft, the turbine shaft configured to compound power with the engine shaft. The turbine and engine shafts are parallel to and radially offset from one another, and the turbine shaft and the axis of the compressor rotor are parallel to and radially offset from one another. A method of driving a rotatable load of an aircraft is also discussed.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
PRATT & WHITNEY CANADA CORP | LONGUEUIL QUÉBEC J4G 1A1 |
International Classification(s)

- 2015 Application Filing Year
- F02M Class
- 1517 Applications Filed
- 1207 Patents Issued To-Date
- 79.57 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Berube, Stephane | St-Philippe, CA | 12 | 72 |
# of filed Patents : 12 Total Citations : 72 | |||
Bilodeau, Jade | Montreal, CA | 3 | 19 |
# of filed Patents : 3 Total Citations : 19 | |||
Bolduc, Sebastien | St-Bruno, CA | 23 | 157 |
# of filed Patents : 23 Total Citations : 157 | |||
Fontaine, Mike | Boucherville, CA | 36 | 536 |
# of filed Patents : 36 Total Citations : 536 | |||
Gagnon-Martin, David | Longueuil, CA | 35 | 201 |
# of filed Patents : 35 Total Citations : 201 | |||
Julien, Andre | Ste-Julie, CA | 81 | 615 |
# of filed Patents : 81 Total Citations : 615 | |||
Legare, Pierre-Yves | Chambly, CA | 24 | 609 |
# of filed Patents : 24 Total Citations : 609 | |||
Nichols, Jason | Mississauga, CA | 35 | 163 |
# of filed Patents : 35 Total Citations : 163 | |||
Thomassin, Jean | Ste Julie, CA | 130 | 1270 |
# of filed Patents : 130 Total Citations : 1270 | |||
Villeneuve, Bruno | Boucherville, CA | 43 | 300 |
# of filed Patents : 43 Total Citations : 300 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 5 Citation Count
- F02M Class
- 21.60 % this patent is cited more than
- 7 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Oct 3, 2025 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 3, 2029 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
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

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Apr 24, 2024 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 12 |
Apr 23, 2020 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 8 |
Apr 20, 2016 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Sep 01, 2015 | AS | ASSIGNMENT | free format text: CHANGE OF NAME;ASSIGNOR:PERMELEC ELECTRODE LTD.;REEL/FRAME:037679/0984 Owner name: DE NORA PERMELEC LTD, JAPAN Effective Date: Sep 01, 2015 |
Dec 03, 2014 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Mar 31, 2014 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHLORINE ENGINEERS CORP. LTD.;REEL/FRAME:032644/0804 Owner name: PERMELEC ELECTRODE LTD., JAPAN Effective Date: Mar 31, 2014 |
Nov 06, 2012 | I | Issuance | |
Oct 17, 2012 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
May 15, 2008 | P | Published | |
Jan 28, 2008 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAYAMIZU, NAOYA;SHIBATA, YUKIHIRO;KATO, MASAAKI;AND OTHERS;REEL/FRAME:020420/0819;SIGNING DATES FROM 20070702 TO 20080121 Owner name: KABUSHIKI KAISHA TOSHIBA, JAPAN free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAYAMIZU, NAOYA;SHIBATA, YUKIHIRO;KATO, MASAAKI;AND OTHERS;REEL/FRAME:020420/0819;SIGNING DATES FROM 20070702 TO 20080121 Owner name: CHLORINE ENGINEERS CORP. LTD., JAPAN free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAYAMIZU, NAOYA;SHIBATA, YUKIHIRO;KATO, MASAAKI;AND OTHERS;SIGNING DATES FROM 20070702 TO 20080121;REEL/FRAME:020420/0819 Owner name: CHLORINE ENGINEERS CORP. LTD., JAPAN free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAYAMIZU, NAOYA;SHIBATA, YUKIHIRO;KATO, MASAAKI;AND OTHERS;SIGNING DATES FROM 20070702 TO 20080121;REEL/FRAME:020420/0819 Owner name: KABUSHIKI KAISHA TOSHIBA, JAPAN |
Jun 14, 2007 | F | Filing | |
Jun 16, 2006 | PD | Priority Date |

Matter Detail

Renewals Detail
