There is a $500 per incident penalty for false patent marking. If a application is no longer pending then it would be a false marking to mark newly produced items with that mark. Of course you can file a non provisional at the end of the year or even another provisional application.
The law https://www.law.cornell.edu/uscode/text/35/292
I don’t know if there is a legal aspect, but for me you have a patent pending if you have an active application in process. From the USPTO site.
A provisional application for patent has a pendency lasting 12 months
from the date the provisional application is filed. The 12-month
pendency period cannot be extended. Therefore, an applicant who files
Data scraping is much harder than you think. While all the file wrappers are available in PDF, before electronic filing became common the originals were on paper, and the PDF is just an image file.
Sometimes the paper has handwriting on it, although this is rare.
The file wrappers have invaluable information on what prior art was cited against the ...