The government may extend the deadline for imposition of higher customs duties on 29 products, imported from the U.S. by another 45 days. Among the 29 products are almonds, walnuts and pulses.The Central Board of Indirect Taxes and Customs is likely to issue an amended notification extending the date for the new levy on August 4. While the import duty on walnut was to be hiked to 120 percent from 30 percent earlier, duty on chickpeas, Bengal gram and masur dal was to be hiked to 70 percent from 30 percent. Levy on lentils was to be hiked to 40 percent from 30 percent.