BI-METAL DRILL BIT
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Nov 6, 2014
app pub date -
Mar 12, 2014
filing date -
Mar 15, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Importance

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Non-US Coverage
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Abstract
A bi-metal drill bit includes a body defining a cutting end and a shank end. At least a portion of the cutting end is formed of a first metal section and at least a portion of the shank end is formed of a second metal section that is welded to the first metal section. The first metal section has a first metal having a material hardness that is higher than a second material hardness of the second metal section. One of the first and second metal sections is treated either by coating or oxide treating so as to have a recognizable different appearance than the other of the first and second metal sections. A length to diameter ratio of the first metal section has been optimized to allow electrical resistance welding, provide better strength in the rear end after the tip breaks through a workpiece, and to minimize cost.
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 | |
---|---|---|
BLACK & DECKER INC | 1000 STANLEY DRIVE NEW BRITAIN CT 06053 |
International Classification(s)

- 2014 Application Filing Year
- B23B Class
- 472 Applications Filed
- 409 Patents Issued To-Date
- 86.66 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
JOHNSON, David N | Doncaster, GB | 27 | 425 |
# of filed Patents : 27 Total Citations : 425 | |||
SANTAMARINA, Aland | Columbia, US | 47 | 644 |
# of filed Patents : 47 Total Citations : 644 | |||
STEINBRUNNER, Glen V | Bel Air, US | 20 | 354 |
# of filed Patents : 20 Total Citations : 354 |
Cited Art Landscape
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Patent Citation Ranking
- 2 Citation Count
- B23B Class
- 8.83 % 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 6, 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 |
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