CHARTER-CRELLIN <CRTR> TO ACQUIRE SEBRO PLASTICS Charter-Crellin Inc said it signed a letter of intent to acquire all outstanding shares of <Sebro Plastics Inc's> capital stock. Charter-Crellin, a molded plastic product maker, said Sebro is a precision molder of engineered specialty plastic products for the automotive industry. The company said the deal is subject to the execution of a definitive purchase agreement.