The Goodyear Patent for the use of vulcanized rubber in manufactorios, which has had twenty-one yoars existence in the United States, expired on Thursday last, and this great branch of industry haa now eoased to be a monopoly. The profita on this patent in this country, during the last twenty-ono. yetas, are to, be estimated at forty niillions of dollars, . of whioh onc-fourth was recoived by Charles Goodyear, the original patentoe, and his heirs. During the last üongresa, cxertions were made to obtain the passage of a special act, roncwing the patent, but it was dofeatcrl by the exortions of the railroad oompanies, who aro largely interested in vtleanizod rubber mnnufacturea.