US Plant Patent PP23858
DG8-108
Chlamydomonas reinhardtii alga variety named ‘DG8-108’
UNDER PATENT
Still under patent. Protection ends May 23, 2031.
Twenty years from the filing date would end on April 18, 2031. This patent earned 35 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP23858
- Filed
- April 18, 2011
- Granted
- August 27, 2013
- Expires
- May 23, 2031
- Assignee
- BIEL KARL Y, LADYGIN VLADIMIR G, NII CALVIN M
- Inventor
- BIEL KARL Y; LADYGIN VLADIMIR G; NII CALVIN M
Abstract
A novel variety of the unicellular green algae Chlamydomonas reinhardtii , named ‘DG8-108’, was created by exposing wild-type C. reinhardtii to γ-radiation exposure. This new and distinct alga variety demonstrates nearly double the biomass and photosynthetic productivity of wild-type C. reinhardtii under both optimal and stress conditions.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
What is claimed is: 1. A new and distinct variety of alga of the genus Chlamydomonas , named Chlamydomonas reinhardtii variety ‘DG8-108’, substantially as herein described and illustrated, which is principally characterized by having 2.5 times higher rates of photosynthesis, 2 times greater total productivity, 2 times greater biomass accumulation and higher environmental stress tolerance compared to wild-type.
Read the full patent: US Plant Patent PP23858 in full — the complete specification, every figure, and the file history.