251 - Sidney Gilchrist THOMAS (1850 - 1885) (5) [1] [2]

On 27 September 1879 THOMAS filed his fifth patent application as demande de brevet de perfectionnement on the patent application filed on 29 July 1879 (No 242).  It carried the title of:

Innovations dans la fabrication de l’acier Bessemer et du métal ou fer fondu

It was granted on 28 September 1880 under the 1880 Patent Law. [3]

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[1] FamilySearch database

[2] Wikipedia

[3] LU patent No 71

[4] see also No 235, No 240, No 242, No 243, No 259, No 268, No 274, No 275

(12/02/2021)