Ralph Kugler, the non-Executive Chairman of Byotrol, an anti-micorbial hygiene firm, has made a double purchase of shares in the same week the company made the announcement of a 'landmark agreement' with Kimberly-Clark Corporation. 56-year-old Kugler purchased 150,000 shares on Wednesday at 7.5p each for a total of £11,250 and a day later topped that up with another 250,000 shares for 7.625p a pop. The total purchase, which took his stake in the company to 1.7m shares, cost him £30,300. Earlier in the week Byotrol Consumer Products (BCP), which is 50% owned by Byotrol, agreed to enter into a full licensing agreement with Kimberly-Clark."This collaboration has been a significant step in developing Byotrol technology and we see this as a starting point to explore further potential," said Chief Executive Gary Millar. "Byotrol technology offers a unique advantage in the highly competitive global hygiene market. We are confident that this distinguishing quality will make Byotrol a market leader." The shares have risen 44.68% to 8.50p in the past week.Top Director BuysNorth Atlantic Smaller Companies Inv Trust (NAS) Director name: Mr Christopher H B MillsAmount purchased: 5,000 @ 1,020.00p Value: £51,000Victoria (VCP) Director name: Mr David N C GarmanAmount purchased: 10,000 @ 249.00p Value: £24,900Canaccord Financial Inc. (CF.) Director name: Mr Paul ReynoldsAmount purchased: 5,000 @ 300.28p Value: £15,014Byotrol (BYOT) Director name: Mr Ralph David KuglerAmount purchased: 250,000 @ 7.62p Value: £19,050Byotrol (BYOT) Director name: Mr Ralph David KuglerAmount purchased: 150,000 @ 7.50p Value: £11,250NR