US Plant Patent PP7731
Purple Crown
Robinia `Purple Crown`
PUBLIC DOMAIN
Patent expired May 7, 2010. 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
- PP7731
- Filed
- May 7, 1990
- Granted
- December 3, 1991
- Expires
- May 7, 2010
Abstract
A seedling discovered growing in a cultivated area in a row of seedlings resulting from a cross between Robinia hispida, and Robinia pseudoacacia, and noticed because of its more vigorous, narrow upright crown of branches, and particularly at the time of blooming for its abundant purple pea-shaped flowers.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. A new and distinct Robinia hybrid as described and illustrated characterized as to novelty by the vigorous growth, with narrow more upright crown of branches than either parent, the abundant flowering resulting in pendulous racemes of purple pea-shaped flowers with mild fragrance, nearly thornless when branches are mature, and its tolerance of heat, drought and high pH soils.
Read the full patent: US Plant Patent PP7731 in full — the complete specification, every figure, and the file history.