William J. KROLL, the inventor
Luxembourg period (1889 - 1939)
Table of contents
Lead-calcium alloys
Process for the separation and recovery of metals from metal alloys
Process for preparing alkaline-earth metal alloys
Process for desulferising iron and steel
Si-Al alloys (Alusil and Alsia)
Iron, nickel, beryllium alloys
Copper, titanium alloys
Titanium
Manganese-base alloys
Zirconium
Introduction
Contracts between Kroll and Siemens & Halske
1930 contract
1934 contract
The complicated life of Kroll’s US patent applications and patents
Vesting orders
Order 1
Order 2
Order 3
Order 4
Order 5
Appeal by Kroll
Life of the patents after the vesting orders
The “Nickel alloy” patent (US 1,986,585)
The “Titanium” patent (US 2,205,854)
Final note
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The file history of the “Titanium” patent (US 2,205,854)
William KROLL’s patent portfolio
William KROLL’s publications
Medals and honours
“Kroll” as a trademark