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Expiration of patent 5,580,417 as well as technology used in tensioning cap in Figure 5

My first question has to do with patent #5,580,417. I believe this patent is expired, but are there any other patents in force using the same technology? My second question is in regards to the ...
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1answer
61 views

Possible to file for a patent, despite super broad, expired patent already existing?

I was looking to patent an invention I feel to have novelty, but I came across this one pre-existing US patent while doing some research. It was filed over 20 years ago and has since "lapsed". ...
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10 views

Is US6129050 still active? [duplicate]

In reference to the patent: US6129050 Is this patent still active, and if so, what countries is it active in?
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12 views

Elevator driven by flat belt in EU

I am currently doing some research about elevators driven by flat belts. There seem to be a few patents regarding the use of flat belts for elevator suspension means. I found patents US8157058and ...
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1answer
42 views

is this patent ep1020784a2 expired?

I am doing patent search first time and struggling to establish if ep1020784a2 patent is withdrawn or expired? would appreciate feedback from anyone experienced out there. regards Kamesh
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2answers
104 views

Parent patent expired due to non-payment - are issued continuations still valid?

US patent 5938197 shows that it is expired due to non-payment (according to the search here: http://portal.uspto.gov/pair/PublicPair ). This patent has several children/continuations. Does the fact ...
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1answer
36 views

Patent No. USD513117 S1--Is this still a valid patent? [duplicate]

I'm trying to find out if this Patent No. USD513117 S1 is still valid. How can I find out for sure?
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2answers
48 views

Is this patent expired?

Is the USD388287 S patent expired? I am looking to design something similar to this.
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39 views

What should I do with my late father's patents from the 1970's?

I have just come across this information on my late father's patent for an ice-making machine in the 1970's. I am his daughter, and was involved with his business Venturi Refrigeration before his ...
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3answers
3k views

Is an expired patent in the public domain?

From what I've been reading about US patents, once a patent has expired, it enters the public domain and can be freely used. The patent I was looking at was filed on 1/1999 and published in 10/2000. ...
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3answers
4k views

What is a “Lapsed Patent” and which concepts (if any) may still be protected by this Patent?

US6148942 "Infant stroller safely propelled by DC electronic motor" According to Google Patents the 6148942 patent is status Lapsed and according to Public PAIR its status is Expired as of 2008. ...