US Plant Patent PP4511
Dunaliella bardawil
Alga strain
PUBLIC DOMAIN
Patent expired June 26, 1998. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on October 20, 1998, but this patent ends 116 days earlier — a terminal disclaimer gives term back. A source that calculates twenty years from filing would tell you this plant is still protected when it is already free.
The record
- Patent number
- PP4511
- Filed
- October 20, 1978
- Granted
- March 18, 1980
- Expires
- June 26, 1998
- Assignee
- YEDA RES & DEV
- Inventor
- AVRON MORDHAY; BEN-AMOTZ AMI
Abstract
An alga named Dunaliella bardawil is similar to D. salina except that its length is 15-19 μm, its diameter 10-14 μm and its volume 200-1000 μm 3 , and it contains large quantities of carotene and glycerol.
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 Dunaliella, named Dunaliella bardawil, substantially as herein shown and described, characterized by the fact that when grown outdoors in a thin layer the cells are bright orange, the cells containing up to 9% dry weight of carotene and up to 50% glycerol.
Read the full patent: US Plant Patent PP4511 in full — the complete specification, every figure, and the file history.