Lanthanum is considered a rare earth metal because the process to mine it is difficult, time-consuming and expensive. Lanthanum is rarely the dominant lanthanide found in the rare earth minerals, and in their chemical formulae it is usually preceded by cerium. Rare examples of La-dominant minerals are monazite-(La) and lanthanite-(La).
If time is important, you should use Expedited or Rush Processing. Rush Processing (in states where available) Time to process your corporation or LLC formation varies by state with routine processing taking 4 - 6 weeks or even more in the slowest states. In states where it is available, Rush Processing will reduce the time to form your business to about 2 - 3 business days.
Most USCIS services centers are currently taking about 5-6 months to approve a fiancÃ© visa petition. Upon approval, USCIS transfers the petition to your consulate via the National Visa Center. Right now this is taking 30-45 days in most cases. Once the consulate has the petition in hand, the speed of the process is entirely dependent on the individual Embassy.