Obsolescence of the Patent Literature.

Clark, C. V.

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Peer reviewed

ERIC Number: EJ141593

Record Type: Journal

Publication Date: 1976

Pages: N/A

Abstractor: N/A

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Obsolescence of the Patent Literature

Clark, C. V.

Journal of Documentation, 32, 1, 32-52, Mar 76

Here the year by year issue of U.S. patents since 1836 is used to correct for growth their apparent aging, as obtained by a synchronous study of citations made by (a) U.S. patent examiners and (b) periodicals. Apparent and corrected aging are treated in terms of conditional probabilities. (Author)

Descriptors: Obsolescence, Probability, Statistical Analysis

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Identifiers - Location: United States

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