Sealed and zone rotary grate convection solids processing apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 9, 1999
Grant Date -
N/A
app pub date -
Oct 1, 1997
filing date -
Oct 1, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A rotary hearth furnace includes a base having a plurality of first plenums, an upper chamber having a plurality of second plenums and a hearth rotatable between the base and the upper chamber and having a plurality of third plenums. The hearth is moveable between the base and the upper chamber so that two or more of the third plenums are positionable to receive gas exhausted by one of the first plenums and to discharge the received gas into one of the second plenums.
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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TECHINT TECHNOLOGIES INC | 100 CORPORATE CENTER DRIVE CHERRINGTON CORPORATE CENTER CORAOPOLIS PA 15108 |
International Classification(s)

- 1997 Application Filing Year
- F27B Class
- 99 Applications Filed
- 50 Patents Issued To-Date
- 50.51 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Docherty, James P | Carnegie, PA | 5 | 30 |
# of filed Patents : 5 Total Citations : 30 | |||
Johnson, Beverly Earl | Pittsburgh, PA | 1 | 1 |
# of filed Patents : 1 Total Citations : 1 |
Cited Art Landscape
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Patent Citation Ranking
- 1 Citation Count
- F27B Class
- 8.48 % this patent is cited more than
- 26 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 22, 2006 | FPAY | FEE PAYMENT | year of fee payment: 12 |
Jun 20, 2002 | FPAY | FEE PAYMENT | year of fee payment: 8 |
Nov 01, 2001 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Jun 17, 1998 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Jan 03, 1995 | I | Issuance | |
Dec 22, 1994 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Oct 28, 1993 | F | Filing | |
Oct 28, 1993 | PD | Priority Date | |
Oct 13, 1993 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NORTHROP, PAUL SCOTT;WILSON, JAMS LEE;REEL/FRAME:006759/0564 Owner name: MOBIL OIL CORPORATION, VIRGINIA Effective Date: Oct 13, 1993 |

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