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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?

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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.

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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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