The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 1989
Filed:
Sep. 26, 1986
Robert F Helwing, Sunnyvale, CA (US);
Other;
Abstract
The invention relates to a unique set of compositions of matter characterized by including defined active agents covalently bonded to carbonium ion base groups, as well as the method of creating the compositions. The covalently bonded compositions include base groups in the nature of ketene acetals and vinyl ethers and the thio equivalents thereof. The available active agents include alcohols, phenols, carboxylic acids, thiols, amines, amides, urethanes, phosphate esters, sulfonic acids and oximes. The compositions may either be in capped form or leashed to a polymeric backbone. The compositions are ordinarily formed by self actuating reactions when the appropriate base groups and active agents are juxtaposed under proper environmental conditions. The primary uses of the compositions are in controlled release applications such as drugs, topical insecticides and the like or in any application where predictable hydrolytic release of the active agent is desirable.