Green Electric Lamp displayed publicly

Henry Green applied for a patent on a lamp cap on October 17, 1892.

Green applied for a patent on incandescent lamps on January 25, 1895.

1. “A certain substance, the exact nature of which is not made public, is utilized with the ordinary class bulb to sustain the necessary vacuum.”
2. “The peculiar merit of the invention, however, lies in the fact that the Green lamp can be refitted with a new burner any number of times.”
3. “The cost of renewal is very slight by means of the process to be used by the proposed company, whereas by the process employed by other companies the old bulbs are useless and have to be thrown away.”
4. “The original cost of the lamp is also said to be cheaper than others, for the reason that the method does away with the necessity of employing experienced, and therefore high-priced, glass-blowers.”

$100,000 in 1893 would be over $2.9 million in 2021.

Unattributed, "New Industry for Hartford: A Company Being Formed to Manufacture the Green Electric Lamp," Hartford Courant, March 8, 1893, page 3.