Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2005-09-06
2005-09-06
Chen, Tianjie (Department: 2652)
Dynamic magnetic information storage or retrieval
Head
Core
Reexamination Certificate
active
06940692
ABSTRACT:
A process is provided for synthesizing metal salts of perfluorinated polyethers containing at least one carboxylic acid group. The polymeric salts so provided are effective as anti-wetting and corrosion-protective agents. The metal salts of perfluorinated polyether acids may be used to prepare corrosion-protected substrates, including magnetic recording disks and magnetic recording heads.
REFERENCES:
patent: 3367868 (1968-02-01), Skehan
patent: 4169904 (1979-10-01), Czornyj et al.
patent: 4404247 (1983-09-01), Dominguez-Burguette et al.
patent: 4526833 (1985-07-01), Burguette et al.
patent: 4659633 (1987-04-01), Yamaguchi et al.
patent: 4757145 (1988-07-01), Caporiccio et al.
patent: 4786544 (1988-11-01), Saito
patent: 4816334 (1989-03-01), Yokoyama et al.
patent: 5000864 (1991-03-01), Strepparola et al.
patent: 5030494 (1991-07-01), Ahlert et al.
patent: 5049410 (1991-09-01), Johary et al.
patent: 5091249 (1992-02-01), Nishikawa et al.
patent: 5124058 (1992-06-01), Corti et al.
patent: 5211861 (1993-05-01), Lafratta et al.
patent: 5435927 (1995-07-01), Beckwith et al.
patent: 5453539 (1995-09-01), Kondo et al.
patent: 5456980 (1995-10-01), Murakami et al.
patent: 5525392 (1996-06-01), Baum et al.
patent: 5858536 (1999-01-01), Yanagisawa
patent: 6071609 (2000-06-01), Furutani et al.
patent: 6093495 (2000-07-01), Falcone
patent: 6204456 (2001-03-01), Lauffer et al.
patent: 6427325 (2002-08-01), Johansson et al.
patent: 6638622 (2003-10-01), Dai et al.
patent: 01-159830 (1989-06-01), None
Doan et al. (1997), “Dimerization of Carboxylic Acids and Salts: An IR Study in Perfluoropolyether Media,”J. Am. Chem. Soc.119(41):9810-9815.
Dai Qing
Kasai Paul Haruo
Tang Wing Tsang
Chen Tianjie
International Business Machines
Reed Dianne E.
Reed Intellectual Property Law Group
Thibault Harry C.
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