HEAT-TREATMENT OF WATER-ABSORBING POLYMERIC PARTICLES IN A FLUIDIZED BED AT A FAST HEAT-UP RATE
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United States of America Patent
Stats
-
N/A
Issued Date -
Nov 27, 2014
app pub date -
Dec 18, 2012
filing date -
Jan 27, 2012
priority date (Note) -
Published
status (Latency Note)
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Abstract
The present invention relates to a method for heat-treating water-absorbing polymeric particles at a temperature equal to or above 150° C. in a fluidized bed dryer at a fast heat-up rate, the use of a fluidized bed dryer for heat-treating water-absorbing polymeric particles in continuous or batch mode as well as to the heat-treated polymeric particles obtained by the method of the present invention.
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 | |
---|---|---|
EVONIK SUPERABSORBER GMBH | ESSEN |
International Classification(s)

- 2012 Application Filing Year
- F26B Class
- 315 Applications Filed
- 251 Patents Issued To-Date
- 79.69 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Auernig, Sabine | Haguenau, FR | 4 | 43 |
# of filed Patents : 4 Total Citations : 43 | |||
Gartner, Herbert | Baden-Baden, DE | 13 | 354 |
# of filed Patents : 13 Total Citations : 354 | |||
Hager, Marc | Haguenau, FR | 10 | 170 |
# of filed Patents : 10 Total Citations : 170 | |||
Kohler, Hans-Peter | Buhlertal, DE | 9 | 167 |
# of filed Patents : 9 Total Citations : 167 | |||
Lacker, Elisabeth | Rheinau-Freistett, DE | 2 | 3 |
# of filed Patents : 2 Total Citations : 3 | |||
Plochinger, Harald | Buhl, DE | 6 | 70 |
# of filed Patents : 6 Total Citations : 70 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 0 Citation Count
- F26B Class
- 0 % this patent is cited more than
- 11 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 27, 2026 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
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 |
---|---|---|---|
Jun 09, 2025 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Jun 09, 2025 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
May 02, 2025 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: May 02, 2025 |
Dec 23, 2024 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Sep 30, 2020 | 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 |
May 24, 2019 | AS | ASSIGNMENT | free format text: CHANGE OF NAME;ASSIGNOR:PERGO (EUROPE) AB;REEL/FRAME:051170/0294 Owner name: UNILIN NORDIC AB, SWEDEN Effective Date: May 24, 2019 |
May 02, 2017 | I | Issuance | |
Apr 12, 2017 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Oct 20, 2016 | P | Published | |
Jun 28, 2016 | F | Filing | |
Dec 23, 1999 | PD | Priority Date |

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