IP Protection of Kelsall KSS or Cylinder Mold Building Methods

Discussion in 'Boatbuilding' started by zstine, May 6, 2024.

  1. zstine
    Joined: Sep 2013
    Posts: 143
    Likes: 18, Points: 18, Legacy Rep: 10
    Location: New Jersey

    zstine Senior Member

    I'm wondering if another designer can prescribe KSS or Cylinder molding without owing royalties to Kelsall (decedents thereof... RIP) or Kurt Hughes? I didn't find anything with a very quick google patent search, but thought I'd ask the experts on here.
    Thanks!
     
    zstine, May 6, 2024
    #1
  2. Robert Biegler
    Joined: Jun 2017
    Posts: 194
    Likes: 104, Points: 53
    Location: Trondheim

    Robert Biegler Senior Member

    I think the period of protection for patents is generally 20 years, but I advise checking. I am pretty sure I read about both KSS and cylinder moulding more than 30 years ago, so they should be out of patent now.
     
    Robert Biegler, May 13, 2024
    #2
    zstine likes this.
  3. Steve W
    Joined: Jul 2004
    Posts: 1,873
    Likes: 86, Points: 48, Legacy Rep: 608
    Location: Duluth, Minnesota

    Steve W Senior Member

    Do you know if patents actually exist? I actually worked on building a KSS hull at a 3 day workshop with Derek. I don't really remember the details of how he determined the dart locations. The workshop was mainly promoting the KSS method but my son and I were mostly there to gain hands on experience with infusion. I do know that KSS has been around at least since the late 1990s as I bought a video from Derek about 98.
     
    Steve W, Jun 6, 2024
    #3
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