For patent # 5,584,962 I have developed a tensioned hub for the supply roll that fits these machines. This mainly concerns figure 8. My hub design is different.

My questions are:

  1. How can I tell what is patented in 5,586,962. Is the tensioned function patented? Is the hub design?

  2. Also, when would this patent expire?


As with all patents, it is the claims that define what the inventor "owns". In both independent claims there are elements a - h. All of the eight elements must be present for something to infringe.

It looks like this would have expired 17 years from issue which was Dec. of 2013.

  • Why would this patent expire in Dec. of 2013 and not May of 2014?
    – user7793
    Feb 4 '14 at 2:31
  • Now patent term is 20 years from filing. For applications filed before June 1995 it was 17 years from issue. I hope I did the math right.
    – George White
    Feb 4 '14 at 3:07

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