US Plant Patent PP13336
Chirharit
High yielding and stable plant of Cymbopogon flexuosus called ‘Chirharit’
PUBLIC DOMAIN
Patent expired March 29, 2020. 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
- PP13336
- Filed
- March 29, 2000
- Granted
- December 10, 2002
- Expires
- March 29, 2020
- Assignee
- COUNCIL SCIENT IND RES
- Inventor
- PATRA NIRMAL KUMAR; KUMAR SUSHIL; KHANUJA SUMAN PREET SINGH; SHASNEY AJIT KUMAR; KALRA ALOK; SINGH HERIKESH BAHADUR; SINGH HEMENDRA PRATAP; SINGH VED RAM; TANVEER HASAN; MENGI NARESHWAR; RAJPUT DHARMENDRA KUMAR; NEGI MAHENDRA SINGH; TYAGI NEERAJ KUMAR; RAM PALTOO; SINGH VIJAY PAL; SHUKLA RAM SAJEEVAN; KUMAR BIRENDRA; SINGH JITENDRA PRATAP; RAM RAJA; KUMAR VIJAY; SHARMA SHIV RAM
Abstract
The present invention is related to the development of a new and chromosomally distinct vegetatively propagated frost resisted plant of Cymbopogon flexuosus by genetic selection in open pollinated seed progeny of high yielding variety "Cauvery'. The selected plant with stay-green habit withstands prolonged frosting in chilling winter and capable of giving an additional harvest during winter, which is not observed so far in normal varieties.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
We claim: 1. A new and distinct cultivar of Cymbopogon flexuosus, named ‘Chirharit’, as herein shown and described, having the following combination of plant traits: (a) Said plant is a tetraploid variant (chromosomal mutant) of the normal diploid lemongrass variety ‘Cauvery’ and having distinct morphology, (b) Being highly resistant to frost and adapted to both favorable as well as unfavorable environments of regular frosting situations, (c) Producing high biomass, (d) Having high yield of essential oil, (e) Capable of growing in all seasons and producing the same yield, (f) Producing essential oil with high citral pungency conforming to the standard citral concentration much useful in pharmaceutical and perfumery industries, and (g) Producing essential oil containing about 80% or more of citral.
Read the full patent: US Plant Patent PP13336 in full — the complete specification, every figure, and the file history.