Under most jurisdictions copyright protection exists as soon as a work of sufficient originality is fixed in a tangible medium perceptible to human eye, machine, or device. Although there are some exceptions (work-for-hire) copyright protection normally extends to the end of the calendar year, 70 years past the death of the original author
95 years from creation.
Copyright term for software in India is 60 years from the date of publication.
Generally, at least under US Law, copyright protection extends 70 years past the death ot the author/creator of the work.
It all depends on the pill itself.
It was a little over twenty-nine months till it became effective.
In Australia, protection exists for the life of the creator plus 70 years.
In the United States, the copyright protection for a magazine title typically lasts as long as the magazine is actively being published. Once a magazine ceases publication, the copyright protection for its title may no longer apply.
Start by trying to determine the date, who was the photographer (or photographer's employer), and whether the photograph was ever published. Then see the related question, "How long does a copyright last?"
Until 2005, works were protected for the life of the creator plus 50 years. This was extended to life plus 70 years, but copyright was not revived on works that were already in the public domain.
Depends on whether you mean how long is it effective, or how long until it can't be detected by a drug screen.
almost 2 weeks
The length of time it takes for your solar panels to become cost effective really depends on how well they were installed in the first place. In first few years, you should see how effective the panels are in reducing costs.