Dispersant viscosity index improving additive for lubricating oils
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Dec 22, 1998
Grant Date -
N/A
app pub date -
Jan 29, 1997
filing date -
Nov 10, 1994
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Forward Citations
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Abstract
The present invention provides dispersant viscosity index improving additives for lubricating oils. The additives are copolymers comprising from 92 weight percent to 98 weight percent of a polymer backbone and from 2 weight percent to 8 weight percent branches grafted onto the polymer backbone.
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 | |
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EVONIK ROHMAX ADDITIVES GMBH | DARMSTADT DARMSTADT HESSIAN |
International Classification(s)

- 1997 Application Filing Year
- C10N Class
- 4 Applications Filed
- 3 Patents Issued To-Date
- 75 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Moorman, David Sterett | 5311 Bayway Dr., Baytown, TX 77520 | 2 | 24 |
# of filed Patents : 2 Total Citations : 24 | |||
Schauber, Claude C | 85 rue Principale, 67160 Riedseltz, FR | 1 | 2 |
# of filed Patents : 1 Total Citations : 2 | |||
Truong, Nguyen Dinh | Villa no 6, 1 Chemin du Castellet, 06450 Le Rouret, FR | 1 | 2 |
# of filed Patents : 1 Total Citations : 2 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 2 Citation Count
- C10N Class
- 0 % this patent is cited more than
- 27 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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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

Legal Events
Date | Code | Event | Description |
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Jun 23, 2021 | MAFP | MAINTENANCE FEE PAYMENT | free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4 |
Jan 10, 2018 | PD | Priority Date | |
Jan 09, 2018 | I | Issuance | |
Dec 20, 2017 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Mar 05, 2015 | P | Published | |
Sep 03, 2014 | F | Filing | |
Aug 08, 2014 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YAMAKAWA, JUNICHI;REEL/FRAME:034955/0305 Owner name: CANON KABUSHIKI KAISHA, JAPAN Effective Date: Aug 08, 2014 |

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