Tie plate

Railways: surface track – Tie-plates

Reexamination Certificate

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Details

C238S152000, C238S154000, C238S283000, C238S382000, C238S264000, C238S310000, C238S336000, C238S338000, C238S351000, C238S292000

Reexamination Certificate

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11269160

ABSTRACT:
An electrically-insulated tie plate for electrically isolating parts of a railroad rail system from each other. The electrically-insulated tie plate includes a base plate having a recessed area for receiving a railroad rail and a layer of electrically-insulating material covering portions of the base plate.

REFERENCES:
patent: 979478 (1910-12-01), Hall
patent: 1792620 (1931-02-01), Wells
patent: 2867384 (1959-01-01), Toulmin, Jr.
patent: 2996256 (1961-08-01), Moses
patent: 3080120 (1963-03-01), De Turk
patent: 3358927 (1967-12-01), Hein et al.
patent: 3566048 (1971-02-01), Martin
patent: 4047663 (1977-09-01), Reynolds et al.
patent: 4635846 (1987-01-01), Todd
patent: 5203501 (1993-04-01), Vanotti
patent: 5782406 (1998-07-01), Igwemezie
patent: 6131272 (2000-10-01), Girouard, Sr. et al.
patent: 6170756 (2001-01-01), Adkins et al.
patent: 6179215 (2001-01-01), Shea
patent: 6305613 (2001-10-01), Igwemezie
patent: 6305614 (2001-10-01), Adkins et al.
patent: 6308897 (2001-10-01), Remington et al.
patent: 6422479 (2002-07-01), Adkins et al.
Web site pp. 1 and 2 for an epoxy fiberglass insulated rail joint manufactured by Portec Rail Products, Inc., available at www.Portecrail.com, © 2001.
Web site pp. 1 and 2 for a Poly-Insulated® gauge plate insulator manufactured by Portec Rail Products, Inc., available at www.Portecrail.com, © 2001.

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