Underground conduit

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Information

Patent Grant
D285192

References
Source

Patent Number
D285,192
Date Filed
Monday, December 5, 1983
40 years ago
Date Issued
Tuesday, August 19, 1986
37 years ago

Inventors
- Charles E. Hubbard
- Donald E. Berkemeier
Original Assignees
- LOF Plastics Inc.
Examiners
- Word; A. Hugo
- Vinson; Brian N.
Agents
- Oberlin; Phillip S.

US Classifications
- D13 - Equipment for production, distribution, or transformation of energy
- D25 - Building units and construction elements
Field of Search
- US
- D13 12
- D13 13
- 339 20
- 339 21 R
- 339 22 R
- 138 115
- 138 111
- 285 188
- 174 48
- D25 74
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design for an underground conduit, as shown and described.

US Referenced Citations (6)

Number	Name	Date	Kind
D175586	Cataldo	Sep 1955
220765	Linford	Oct 1879
3004330	Wilkins	Oct 1961
4137424	Hesse et al.	Jan 1979
4454692	Ault	Jun 1984
4479687	Humphreys et al.	Oct 1984

Non-Patent Literature Citations (1)

Entry
Sunlight Plastics Extrusions brochure, Item A, p. 1.