This article offers a general explanation as to why hunt lost the patent for the Deep V (perhaps lifting strakes too) . . . seeing that they were on in the 1958 drawings that were published in Boating Magazine.
http://www.bertram31.com/ray_hunt.htm
Hunt shunned the accolades that started coming his way and, as a result, some people considered him standoffish, Deknatel recalled. Meanwhile, other boat companies copied the deep-vee, and Hunt was unable to patent his idea. Drawings had appeared in a boating magazine early in 1958 as part of a story on the design. Patent rules stipulated that a patent application must be filed within a year after the invention has been written about or used - and Hunt had missed the deadline.
A phase of unsuccessful patent infringement suits followed, in which the oversight proved his undoing, Deknatel recalled.