yes they become non copyright when in bitmap form. Wiki (if you believe if) tells all:
In short: Scalable fonts as such are copyrighted as computer programs; typefaces as such may be protected by design patents, and, in a few countries, by copyright; actual use of the typeface is not restricted, even if the font used was based illegally on a protected typeface.
Under U.S. law, typefaces and the characters they contain are considered to be utilitarian objects whose utility outweighs any merit that may exist in protecting their creative elements. As such, typefaces are exempt from copyright protection in the United States (Code of Federal Regulations, Ch 37, Sec. 202.1(e); Eltra Corp. vs. Ringer). However, this finding was limited in Adobe vs. Southern Software, Inc., wherein it was held that scalable computer fonts, ie., the instructions necessary to render a typeface, constitute a "computer program" for the purposes of copyright law and hence are subject to protection. Hence the computer file(s) associated with a scalable font will generally be protected even though the specific design of the characters is not. Furthermore, a rasterized representation (e.g. bitmap) of the characters in a scalable font is not protected by copyright in the United States. According to section 503.02(a) of the Compendium II, typography and calligraphy are not copyrightable in themselves in the U.S. This treatment of fonts is not very unusual with respect to international law, and most other jurisdictions do not consider fonts subject to copyright either (with the notable exception of the UK, which however also only covers typefaces as such, as they are for example employed in fonts, and not their actual use.[3]). However, typefaces as such may be protected by design patents in many countries (either automatically, or by registration, or by some combination thereof). A prominent example is the European Union,[4] where the automatic protection (without registration) expires after three years and can be extended (by registration) up to 25 years.[5]
In short: Scalable fonts as such are copyrighted as computer programs; typefaces as such may be protected by design patents, and, in a few countries, by copyright; actual use of the typeface is not restricted, even if the font used was based illegally on a protected typeface.
Under U.S. law, typefaces and the characters they contain are considered to be utilitarian objects whose utility outweighs any merit that may exist in protecting their creative elements. As such, typefaces are exempt from copyright protection in the United States (Code of Federal Regulations, Ch 37, Sec. 202.1(e); Eltra Corp. vs. Ringer). However, this finding was limited in Adobe vs. Southern Software, Inc., wherein it was held that scalable computer fonts, ie., the instructions necessary to render a typeface, constitute a "computer program" for the purposes of copyright law and hence are subject to protection. Hence the computer file(s) associated with a scalable font will generally be protected even though the specific design of the characters is not. Furthermore, a rasterized representation (e.g. bitmap) of the characters in a scalable font is not protected by copyright in the United States. According to section 503.02(a) of the Compendium II, typography and calligraphy are not copyrightable in themselves in the U.S. This treatment of fonts is not very unusual with respect to international law, and most other jurisdictions do not consider fonts subject to copyright either (with the notable exception of the UK, which however also only covers typefaces as such, as they are for example employed in fonts, and not their actual use.[3]). However, typefaces as such may be protected by design patents in many countries (either automatically, or by registration, or by some combination thereof). A prominent example is the European Union,[4] where the automatic protection (without registration) expires after three years and can be extended (by registration) up to 25 years.[5]