Alloys Or Metallic Compositions Patents (Class 420)
- 1.7 percent or more carbon containing (Class 420/9)
- Nine percent or more chromium containing (Class 420/34)
- Eight percent or more manganese containing (Class 420/72)
- Four percent or more aluminum containing (Class 420/77)
- Noble metal containing (Class 420/82)
- Rare earth metal containing (Class 420/83)
- Lead, bismuth, selenium, tellurium or calcium containing (Class 420/84)
- Over 0.05 percent sulfur, over 0.04 percent phosphorus or sulfur or phosphorus added in any amount to promote machinability (Class 420/87)
- Copper containing (Class 420/89)
- Over 10 percent nickel containing (Class 420/94)
- One percent or more carbon containing, but less than 1.7 percent (Class 420/99)
- Over 0.1 percent aluminum containing, but less than 4 percent (Class 420/103)
- Chromium containing, but less than 9 percent (Class 420/104)
- Two percent or more silicon containing (Class 420/117)
- Nickel containing, but 10 percent or less (Class 420/119)
- 1.5 percent or more manganese containing, but less than 8 percent (Class 420/120)
- Boron containing (Class 420/121)
- Tungsten containing (Class 420/122)
- Molybdneum containing (Class 420/123)
- Zirconium containing (Class 420/125)
- Titanium containing (Class 420/126)
- Vanadium, tantalum or niobium containing (Class 420/127)
- Nitrogen containinig (Class 420/128)
- Processes (Class 420/129)
- Tin containing (Class 420/470)
- Zinc containing (Class 420/477)
- Nickel containing (Class 420/485)
- Aluminum, gallium, indium, or thallium containing (Class 420/489)
- Silicon containing (Class 420/490)
- Lead containing (Class 420/491)
- Titanium, zirconium or hafnium containing (Class 420/492)
- Manganese containing (Class 420/493)
- Beryllium, magnesium, or alkaline earth metal containing (Class 420/494)
- Other refractory metal containing (Class 420/495)
- Iron or cobalt containing (Class 420/496)
- Noble metal containing (Class 420/497)
- Cadmium, or mercury containing (Class 420/498)
- Phosphorus, arsenic, antimony, or bismuth containing (Class 420/499)
- Sulfur, selenium, or tellurium containing (Class 420/500)
- Copper containing (Class 420/529)
- Zinc containing (Class 420/540)
- Magnesium containing (Class 420/542)
- Silicon containing (Class 420/548)
- Iron, cobalt, or nickel containing (Class 420/550)
- Titanium, zirconium, hafnium, vanadium, niobium, or tantalum containing (Class 420/552)
- Cadmium, lead, or bismuth containing (Class 420/554)
- Alkali, alkaline earth metal or magnesium containing (Class 420/564)
- Silver containing (Class 420/566)
- Arsenic containing (Class 420/567)
- Tin containing (Class 420/570)
- Antimony containing (Class 420/572)
- Copper containing (Class 420/573)
- Zinc containing (Class 420/574)
- Cadmium containing (Class 420/575)
