DD143504A5 - Device for controlling and continuous supply of a chemical - Google Patents

Device for controlling and continuous supply of a chemical Download PDF

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Publication number
DD143504A5
DD143504A5 DD79212725A DD21272579A DD143504A5 DD 143504 A5 DD143504 A5 DD 143504A5 DD 79212725 A DD79212725 A DD 79212725A DD 21272579 A DD21272579 A DD 21272579A DD 143504 A5 DD143504 A5 DD 143504A5
Authority
DD
German Democratic Republic
Prior art keywords
chemical
characterized
water
device according
hydrogel
Prior art date
Application number
DD79212725A
Other languages
German (de)
Inventor
David S Dresback
Original Assignee
Pfizer
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US90404978A priority Critical
Priority to US90407878A priority
Priority to US06/014,388 priority patent/US4220153A/en
Priority to US06/014,387 priority patent/US4220152A/en
Application filed by Pfizer filed Critical Pfizer
Publication of DD143504A5 publication Critical patent/DD143504A5/en

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