US Plant Patent PP4621
Plum tree
PUBLIC DOMAIN
Patent expired July 9, 1999. This plant is in the public domain — anyone may propagate and sell it.
No term adjustment or disclaimer is recorded against this patent, so this is the full statutory term — twenty years from the filing date.
The record
- Patent number
- PP4621
- Filed
- July 9, 1979
- Granted
- January 13, 1981
- Expires
- July 9, 1999
- Inventor
- KITAHARA LAWRENCE K; KITAHARA KEI
No cultivar name of record
This patent does not name the plant. Through the 1980s and early 1990s that was still common: naming every new cultivar only became standard practice as plants began to be marketed under brand names. The grant identifies this one by its number and by a written description instead.
Nothing here is missing from our records: the patent itself states no name. Where one exists we show it, and we do not invent one.
Abstract
A plum tree generally similar to the Red Beaut Plum Tree (U.S. Plant Pat. No. 2,539) which it most nearly resembles, bearing reddish skinned, yellow-fleshed clingstone fruit which ripens from five to seven days earlier than and is larger, more highly colored, and of superior texture and flavor to that of the Red Beaut.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
Having thus described and illustrated our new variety of plum tree, what is new and desired to be secured by Letters Patent is: 1. A new and distinct variety of plum tree, substantially as illustrated and described, characterized by its regular and productive bearing of clingstone fruit of medium size having a reddish skin and flesh which is yellow when the fruit is picking ripe and by its resemblance to the Red Beaut Plum Tree (U.S. Plant Pat. No. 2,539) but from which it is distinguished by bearing fruit ripening from five to seven days earlier, having flesh of a more tender and less fibrous texture and a more delicate vinuous flavor, and having a more globose shape and a more highly colored skin.
Read the full patent: US Plant Patent PP4621 in full — the complete specification, every figure, and the file history.