FR790645A - Procédé de production de moules métalliques, plus particulièrement à partir de matrices originales d'enregistrement du son
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Procédé de production de moules métalliques, plus particulièrement à partir de matrices originales d'enregistrement du son
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RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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Application filed by RCA Corp, Radio Corporation of AmericafiledCriticalRCA Corp
Application grantedgrantedCritical
Publication of FR790645ApublicationCriticalpatent/FR790645A/fr
C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
C25D5/34—Pretreatment of metallic surfaces to be electroplated
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Chemical & Material Sciences
(AREA)
Engineering & Computer Science
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Chemical Kinetics & Catalysis
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Electrochemistry
(AREA)
Materials Engineering
(AREA)
Metallurgy
(AREA)
Organic Chemistry
(AREA)
FR790645D1934-05-311935-05-29Procédé de production de moules métalliques, plus particulièrement à partir de matrices originales d'enregistrement du son
ExpiredFR790645A
(fr)
Matrice d'estampage pour films d'enregistrement sonore à inscription mécanique du son et procédé de production de films d'enregistrement sonore au moyen de cette matrice