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17 June 1837  Curing Charles Goodyear ref. from description of Patent 849.   Another source
Inventors.about.com  gives 1837 No. 240 other sources give 1839 & 1841.
849   24 July 1838   Charles Goodyear improvement in the manufacture of Gum Elastic shoes.
1839 4 yrs before Hancock in 1843 - Readers Digest reprint on Goodyear site - seems dubious given the other
references. Incidentally the Hancock patent came before the period when Patent notifications appeared in the
Gazettes.
1844 June 24 3.633  Vulcanization process invented. Charles Goodyear. ref from  Inventors.about.com
Reference from Nelson's 1851 Patent = Charles Goodyear June 15th 1844  Curing Process reissued Dec 25
1849
India Rubber Fabrics - and machinery Charles Goodyear  3,461  9 March 1844.
Improvement in India Rubber Fabrics - Machinery Charles Goodyear 3,462   9 March 1844.

Improvement in the manufacture of Indurated Rubber Fabrics - addition of grit or hard-filings Nelson Goodyear
4,005   22 April 1845.
Improvement in India Rubber Fabrics-process Charles Goodyear 4,047 13 May 1845.
Improvement in making hollow articles of rubber - Charles Goodyear 5,536 25 April 1848.
Elastic cord for suspenders utilising Metallic or Vulcanized rubber. Nelson Goodyear  6,786 16 October 1849.
Improvement in the manufacture of India Rubber- additions to mixture. Nelson Goodyear 8,075 6 May 1851.
Current US Specification: 524/77; 126/99.00R; 264/175; 524/928; 525/332.6


The US Patent Office has no jurisdiction over questions relating to infringement of patents. In examining
applications for patent, no determination is made as to whether the invention sought to be patented infringes
any prior patent. An improvement invention may be patentable, but it might infringe a prior unexpired patent for
the invention improved upon, if there is one.

Hancock's UK patent was granted on a first past the post basis  - the post being not the discovery but the
patenting thereof.

3633   June 15, 1844.
Goodyear