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: 141
    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.
  2. Robert Biegler
    Joined: Jun 2017
    Posts: 178
    Likes: 95, Points: 38
    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.
    zstine likes this.
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