Bathtub-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking units
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jan 8, 2013
Grant Date -
Aug 18, 2011
app pub date -
Mar 23, 2011
filing date -
Mar 9, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An improved spent catalyst regenerator which contains sub-troughs branching off from the main trough, distribution troughs which extend outward from the sides of the main trough and the sub-troughs, and downflow tubes extending downward from the bottom of the main trough and sub-troughs.
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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STONE & WEBSTER PROCESS TECHNOLOGY INC | 1430 ENCLAVE PARKWAY HOUSTON TX 77077 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Gbordzoe, Eusebius | Houston, US | 10 | 50 |
# of filed Patents : 10 Total Citations : 50 | |||
McQuiston, Harvey | Katy, US | 6 | 5 |
# of filed Patents : 6 Total Citations : 5 | |||
Santner, Chris | Houston, US | 7 | 155 |
# of filed Patents : 7 Total Citations : 155 |
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Patent Citation Ranking
- 2 Citation Count
- B01J Class
- 8.96 % this patent is cited more than
- 12 Age
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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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Dec 30, 2004 | FPAY | FEE PAYMENT | year of fee payment: 8 |
Dec 21, 2000 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Dec 02, 1999 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Jul 08, 1997 | I | Issuance | |
Jun 25, 1997 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Sep 07, 1995 | F | Filing | |
Jul 22, 1995 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WIMBY, MARTIN;HANSON, CHARLOTTA;REEL/FRAME:007885/0618 Owner name: KVAERNER PULPING TECHNOLOGIES AB, SWEDEN Effective Date: Jul 22, 1995 |
Jan 11, 1993 | PD | Priority Date |

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