Appeal 2007-0040
Application 10/170,069
Patent 6,073,699
be hingedly openable on a second side of the elevator. In
certain aspects such an elevator has at least one roller
secured to an interior of at least one of the body parts to
facilitate movement of a wellbore tubular with respect to
the elevator, and inparticular aspects has a plurality of
spaced apart rollers. In one such elevator the plurality of
rollers is one or more rollers on each body part.
B. Prosecution history of the original application
2. The patent sought to be reissued is based on Application
09/036,271, filed March 6, 1998 (the “original application”).
3. As filed, the original application contained claims 1-5 including
representative independent claim 1 (identical to reissue claim 4 supra) which
is reproduced below:
1. An elevator for use in wellbore operations, the elevator
comprising
a first body part,
a second body part,
the body parts together defining an interior opening
through the elevator for accommodating a wellbore tubular
therein,
first hinge apparatus hingedly connecting the two body
parts together and permitting the two body parts to be hingedly
openable on a first side of the elevator, and
second hinge apparatus disposed across from the first
hinge apparatus, the second hinge apparatus hingedly
connecting the two body parts together and permitting the two
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