The drill bit comprises a cutting blade formed at one end of a shank. The cutting blade has a pair of cutting shoulders that extend inwardly from the outer sides of the blade toward the bit axis. A tip having converging sides that create a point extends from the shoulders. The cutting edge of each shoulder is beveled with respect to the plane of the face of the blade. A flute is provided on the leading portion of each blade face adjacent the cutting edges. Each flute is a smooth curve that creates a substantially uninterrupted recess on each face of the blade that facilitates chip removal, increases the drill rate and lowers the power required to drill a hole. A non-stick coating may be applied to the blade to further facilitate chip removal.

Claims

5 · 1 independent · depth 2

5 granted claims

›1.independentA drill bit comprising: a shaft defining a longitudinal axis of the bit; a relatively thin, flat blade attached to the shaft, said blade having a rela…+4

Classifications

5 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B23B51/02
B27G15/00

USPC · US Patent Classification

408/225408/227408/229

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

2.2 y

819 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Eric A Gates

art unit 3726 · TC 3700

Law firm

Law firm · Log in to unlock

Citations: 18 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20080279647 A1	13 Nov 2008

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.