It can be abbreviated MNTAIN, MNTN, MOUNTIN, MT, MTIN, MTN. However, the most common abbreviation used is MT. For the source and more detailed information concerning this sub â¦ ject, click on the related links section indicated below.ne common abbreviation is ca.. Another way is the equals sign = with a squiggle over it-- like an S on its side. ## The word about is abbreviated as: abt.
For applications filed before June 8, 1995 and for patents that were still in force on June 8, 1995, the patent term is either 17 years from the issue date or 20 years from the filing date of the earliest U.S. or international (PCT) application to which priority is claimed (excluding provisional applications), the longer term applying.
The commonly held view of how to calculate US patent expiry dates is as follows: 1  For applications filed prior to, and still in force or pending on, 8 June 1995, the expiry date is the later of 17 years from the issue date, and 20 years from the filing date. For example, US 5219846 has a filing date of 20 December 1991 and an issue date of 15 June 1993.