The US patent number is US 7198789 B2.
No, once a patent expires the invention is public domain and can never be patented again.
According to the article in Smart Money linked below, the patent continues through December 2016.
HUMIRA's primary patent expired in the United States on December 31, 2016, but the drug remained protected by additional patents until 2023. The last of these patents related to formulations and methods of use expired in 2023, which allowed for the introduction of biosimilars. Consequently, the availability of biosimilar versions of HUMIRA began in the U.S. in 2023.
There is no US patent 555408021. There is also no US patent 55408021.
The number is 3359678
You will have to check with the US Patent Office
US Patent No. 1582
According to the link shown below, the United States Patent and Trademark Office lists the expiration date as October 23, 2012. http://www.fda.gov/OHRMS/DOCKETS/dailys/04/july04/071504/99e-1086-let00003-vol1.pdf
Humira is my name
It is US47114711UHP
That is the patent number for the first basketball. The person credited with inventing the basketball was G.L. Pierce.
Use this link to research US Patent Numbers: http://patft.uspto.gov/netahtml/PTO/srchnum.htm