US Plant Patent PP23698
New Old Yella
Hibiscus plant named ‘New Old Yella’
UNDER PATENT
Still under patent. Protection ends July 4, 2031.
Twenty years from the filing date would end on February 24, 2031. This patent earned 130 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP23698
- Filed
- February 24, 2011
- Granted
- July 2, 2013
- Expires
- July 4, 2031
- Assignee
- ZWETZIG GRETCHEN
- Inventor
- ZWETZIG GRETCHEN
Abstract
A New and distinct cultivar of winter hardy Hibiscus plant named ‘New Old Yella’ is the result of a unique hybridization. This new and distinct cultivar is characterized primarily as to its novelty by its extreme cold hardi ness to Zone 4, its large thick-textured, light yellow flowers and its “Maple-shaped” leaves with a green coloration, Compactness of about 3 feet, its vigorous and uniform growth habit and its floriferous nature from midsummer until frost.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
The invention claimed: 1. A new and distinct cultivar of hardy Hibiscus plant, as herein shown and described, characterized by its compact nature, refined “maple-like” foliage of a green coloration, its large glowing light yellow flowers, its vigor and its hardiness.
Read the full patent: US Plant Patent PP23698 in full — the complete specification, every figure, and the file history.