Mixture-lubricated four-stroke engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 13, 2020
Grant Date -
Jul 18, 2019
app pub date -
Jan 16, 2019
filing date -
Jan 17, 2018
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Abstract
A mixture-lubricated four-stroke engine has a cylinder and a piston. On the piston, at least one piston ring is arranged. Between valve drive chamber and crankcase interior, at least one first channel is arranged. The first opening of the first channel lies in the bottom dead center position of the piston below each piston ring. At the first opening, the first channel defines a first middle flow direction for mixture flowing into the crankcase interior. The first middle flow direction extends inclined towards the combustion chamber and in a viewing direction perpendicular to the cylinder longitudinal plane intersects the longitudinal center axis above the first opening of the first channel.
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 | |
---|---|---|
ANDREAS STIHL AG & CO KG | BADSTRASSE 115 WAIBLINGEN 71336 |
International Classification(s)

- 2019 Application Filing Year
- F01M Class
- 328 Applications Filed
- 226 Patents Issued To-Date
- 68.91 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Dangelmaier, Manuel | Wernau, DE | 8 | 30 |
# of filed Patents : 8 Total Citations : 30 | |||
Groskopf, Gordon | Stuttgart, DE | 2 | 0 |
# of filed Patents : 2 Total Citations : 0 |
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Patent Citation Ranking
- 0 Citation Count
- F01M Class
- 0 % this patent is cited more than
- 5 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Apr 13, 2028 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 13, 2032 |
Fee | Large entity fee | small entity fee | micro entity fee |
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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

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Apr 11, 2024 | P | Published | |
Nov 21, 2022 | STPP | INFORMATION ON STATUS: PATENT APPLICATION AND GRANTING PROCEDURE IN GENERAL | free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
Oct 07, 2022 | F | Filing | |
Oct 07, 2022 | FEPP | FEE PAYMENT PROCEDURE | free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Jul 13, 2022 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ANATTASAKUL, ROATCHANATAM;NG, PIUS;REEL/FRAME:061627/0292 Owner name: KUBOTA CORPORATION, JAPAN Effective Date: Jul 13, 2022 |

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