Drill bit having improved cutter configuration
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 3, 1990
Grant Date -
N/A
app pub date -
Jun 9, 1988
filing date -
Jun 9, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The subject drill bits include a body member with cutter blades having a generally parabolic bottom profile. The cutter blades each include a diamond cutting face which increases in vertical height generally as a function of increased distance from the center line of the bit. The increased height allows the bits to provide a desired total diamond cutting volume at each radius of the bit, while allowing the diamond contact area to remain generally constant as the bit wears.
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 | |
---|---|---|
EASTMAN CHRISTENSEN COMPANY A CORP OF DE | 365 BUGATTI STREET SALT LAKE CITY UT 84126 |
International Classification(s)

- 1988 Application Filing Year
- E21B Class
- 682 Applications Filed
- 2 Patents Issued To-Date
- 0.30 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Jones, Mark L | Midvale, UT | 26 | 940 |
# of filed Patents : 26 Total Citations : 940 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 283 Citation Count
- E21B Class
- 0 % this patent is cited more than
- 35 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 |
---|---|---|---|
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 |
---|---|---|---|
Dec 24, 2007 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Nov 23, 2007 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Nov 23, 2007 |
Nov 23, 2007 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
Jun 07, 2007 | REMI | MAINTENANCE FEE REMINDER MAILED | |
Apr 30, 2003 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Nov 23, 1999 | I | Issuance | |
Jun 26, 1998 | F | Filing | |
Jun 17, 1998 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GERTEIS, HANS;REEL/FRAME:009321/0460 Owner name: HEINKEL INDUSTRIEZENTRIFUGEN GMBH & CO., GERMANY Effective Date: Jun 17, 1998 |
Nov 08, 1996 | PD | Priority Date |

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