In Re Hans Nettel

972 F.2d 1354, 1992 U.S. App. LEXIS 28553, 1992 WL 124285
CourtCourt of Appeals for the Federal Circuit
DecidedJune 10, 1992
Docket91-1398
StatusUnpublished

This text of 972 F.2d 1354 (In Re Hans Nettel) is published on Counsel Stack Legal Research, covering Court of Appeals for the Federal Circuit primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
In Re Hans Nettel, 972 F.2d 1354, 1992 U.S. App. LEXIS 28553, 1992 WL 124285 (Fed. Cir. 1992).

Opinion

972 F.2d 1354

NOTICE: Federal Circuit Local Rule 47.8(b) states that opinions and orders which are designated as not citable as precedent shall not be employed or cited as precedent. This does not preclude assertion of issues of claim preclusion, issue preclusion, judicial estoppel, law of the case or the like based on a decision of the Court rendered in a nonprecedential opinion or order.
In re Hans NETTEL.

No. 91-1398.

United States Court of Appeals, Federal Circuit.

June 10, 1992.

Before ARCHER, Circuit Judge, EDWARD S. SMITH, Senior Circuit Judge, and LOURIE, Circuit Judge.

DECISION

LOURIE, Circuit Judge.

Hans Nettel appeals the October 31, 1991 decision of the Patent and Trademark Office Board of Patent Appeals and Interferences (Board), as supplemented by two reconsideration decisions, affirming the rejection of claims 1-4 and 6 in the reexamination of Nettel's U.S. Patent 4,823,411, entitled "CLEANOUT EXTENSION ADAPTOR," as unpatentable under 35 U.S.C. § 103. We affirm.

DISCUSSION

Nettel's '411 patent relates to a plastic cleanout extension adaptor and method of inserting it in the end of a plastic sewer pipe to mount flush with the surrounding surface of a cement floor or wall construction. Claim 1 provides:

1. A cleanout extension adaptor for use in the flush mounting of a cleanout extension comprising:

a cylindrical body having an axial throughbore and an external diameter that is slightly less than the internal diameter of the cleanout extension;

a radially outwardly extending lip on the top of said cylindrical body for extending over and engaging the top edge of said cleanout extension for positioning and supporting the cleanout adaptor in position when inserted in said cleanout extension;

means for affixing said cleanout extension adaptor to the interior of said cleanout extension; and

means on the interior of said cleanout extension adaptor for seating a sealing plug so that said sealing plug is substantially even with the area surrounding the top of the cleanout extension.

The only other independent claim on appeal, claim 6, is a method claim setting forth the steps of installing a cleanout extension adaptor so that the top of the sealing plug is substantially level with the surrounding surface:

6. The method of installing and sealing a cleanout extension so that it is substantially even with the surrounding surface without disturbing the surrounding surface, comprising the steps of:

cutting the cleanout extension to a height that is substantially level with the surrounding surface;

selecting and mounting an adaptor in the top portion of said cleanout extension to receive a sealing plug within the confines of said cleanout extension;

selecting said adaptor to have a generally tubular configuration with an internal threaded bore and an outer diameter to fit within the bore of the cleanout extension and to have an outwardly extending lip for engaging and overlapping the cut end of the cleanout extension for providing a finish to said cut end and for positioning and supporting said adaptor; and

inserting a threaded sealing plug into the cleanout extension so that the top of the sealing plug is substantially level with the surround [sic, surrounding] surface.

The principal problem addressed in the '411 patent is the inconvenience of the conventional approach to installing and closing the end of a cleanout extension pipe, which involves breaking out the hardened cement floor or wall surface around the end of the extension, attaching a cap, and then restoring the floor surrounding the extension.

The Board affirmed the examiner's rejection of claims 1, 2, 4, and 6 as unpatentable under 35 U.S.C. § 103 over Terry U.S. Patent 3,343,704 in view of Panella U.S. Patent 3,148,708.1 Terry relates to an electrical outlet box structure in which a cylindrical portion of the box extends above the floor level and is then cut to floor level after cement is poured, so that the receptacle holder can be inserted parallel to and flush with the floor surface. Panella discloses a cleanout plug assembly which may be inserted either temporarily or permanently into a sewer cleanout pipe for closing and sealing the pipe.

Nettel challenges the Board's conclusion that the appealed claims would have been obvious in view of the combined teachings of the prior art, asserting that "it would not have been obvious to a plumber to take the electrical outlet assembly of Terry and insert it into Panella's sewer cleanout pipe to thereby obtain the invention of Claims 1, 2, 4, and 6." To the extent that Nettel argues that Terry is nonanalogous art, we agree with the Board that the problems addressed in Terry and the '411 patent are the same, viz., problems of conduit installation. As the Board stated:

In both the electrical and plumbing fields of endeavor, it is apparent that there is a common concern for positioning conduit below ground level or within a concrete slab and providing access thereto from above. Particularly with regard to concrete slab construction, it is conventional for both plumbers and electricians to position the necessary conduit prior to the pouring of the concrete slab, and this is done practically simultaneously and certainly in close proximity.

The problem faced by Nettel was the conventional installation of cleanout extensions which required breaking out the floor surface around the end of the extension after the setting of cement, installing an external closure cap on the extension, and then restoring the floor. The same problem of flush-mounting a plastic extension pipe and closure in a cement or concrete floor had been recognized and solved in the context of an electrical system in Terry, in which junction boxes and extensions were installed in cement or concrete floors. We agree with the Board that the teaching of Terry is analogous, and that it has been properly combined with Panella so that the inventions of Claims 1, 2, 4, and 6 would have been obvious to one skilled in the art of building construction.

Nettel also argues that Terry did not make the claimed invention obvious because Terry uses metal and not plastic, and it does not have the "means for affixing" of claim 1. Nettel also asserts that Terry lacks internal threads on ring 14a as required by claim 2, and that ring 14a is not tubular. Finally, Nettel argues that Terry is a temporary installation and would not seal a sewer pipe, which is the intended purpose of Nettel's patent.

Even given these distinctions, the Board held that Nettel's claimed invention would have been obvious. After reviewing the record, we agree that both Terry and Panella show that it was known in the relevant art to install a seal or cover device to a conduit extension which initially extends above the surface but is subsequently cut off at grade, after which an adaptor is installed internally within the end of the conduit such that it is substantially flush with the surface.2

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972 F.2d 1354, 1992 U.S. App. LEXIS 28553, 1992 WL 124285, Counsel Stack Legal Research, https://law.counselstack.com/opinion/in-re-hans-nettel-cafc-1992.