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Thread: 140MM PSU fan patent expired?

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    Default 140MM PSU fan patent expired?

    It looks like this is Super Flower's patent for putting a 140mm fan in a PSU:

    https://twpat2.tipo.gov.tw/tipotwoc/...m?!!FR_M289213

    If so, it looks like it may have expired almost exactly two years ago (as utility patents in Taiwan are only good for 10 years).

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    One can patent a size? surely I have misunderstood.

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    Default

    Quote Originally Posted by ashiekh View Post
    One can patent a size? surely I have misunderstood.
    Not so much fan size as air flow direction within the PSU, which utilizes a 140mm fan in the patent.

    Super Flower's intention was to patent the use of a fan blowing down into the PSU, as opposed to the previously used front to back ventilation means of cooling a PSU (typically done with 80mm fans). Sometimes you have to be very specific in a patent application or some corner cases may be referenced as prior art and the patent denied.

    So where Super Flower "pigeon holed" themselves was to define the fan as 140mm in the patent, as this is the largest fan you can fit into an ATX PSU housing. Because of this very specific detail, companies could use anything smaller than 140mm to accomplish the same thing.

    Problem is, the larger the fan the better, and 140mm is a standard fan size that allows manufacturers to use off the shelf fan frames without having to tool special frames with 120mm bolt patterns to circumvent the patent. 120mm works well, but certainly not as well as 140mm.

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    Default

    Ah, thanks for the clarification; it still seems crazy that one can patent such a thing.

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    Quote Originally Posted by ashiekh View Post
    Ah, thanks for the clarification; it still seems crazy that one can patent such a thing.
    This patent is nothing. At least they were doing something different (at the time). You should see some of the patents that are out there and how "obvious" those are by comparison.

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    Quote Originally Posted by jonnyGURU View Post
    Problem is, the larger the fan the better,
    Not necessarily.
    It depends on the Design.
    On Enhance Designs with big heatsinks over the whole area, yes, probably.
    But on smaller designs like HEC or FSP GHN/HHN?? I doubt it. Someone once told me that the PSU was louder with the 135mm fan they had at the time. OK, might be because the 135mm was not that great but also:


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    Default

    That explains why most manufacturers use 135mm fans on them instead of going straight to standard 140mm. Had this curiosity but never looked into it.

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    When does the Semi Fanless Switch Patent expire? You know something about that?

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    One more thing to know: Taiwan patent is only relevant if the manufacturer/brand is Taiwan based or you wanna sell in Taiwan. Mainland China will not enforce Taiwan patent. This is the same for the rest of the world - if you want your patent to be valid worldwide the cost will be very high because of registration/expansion fees. Most companies therefore only register patents for their main markets.

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    Quote Originally Posted by Stefan Payne View Post
    When does the Semi Fanless Switch Patent expire? You know something about that?
    No. Might already be expired.

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