The protected inventions
The independent claims of all three United States patents are product claims. There are no method claims. The product commonly claimed in all three patents is a chimeric construct comprising any antibiotic resistance gene under control of a promoter that works in plants.
More specifically, the chimeric genes comprise:
- a promoter region expressible in plant cells,
- a structural DNA sequence encoding a polypeptide that confers antibiotic resistance to the plant cell, and a non−translated region encoding a mRNA polyadenylation signal.
The independent claims of the United States patents differ from each other in the following aspects:
|Aspects||US 5034322||US 6174724||US 6255560 (now lapsed)|
|Promoter Type||A. tumefaciens opine synthase gene & ribulose−1,5−bis−phosphate carboxylase small subunit (rbcS gene) (Claim 1 & 6)||a “naturally expressed” in plants (Claim 1 & 8)||35S CaMV and 19S CaMV (all independent claims)|
|Antibiotic Resistance Gene||any (claim 1) & neomycin phosphotransferase (claim 6)||any (claim 1) & neomycin phosphotransferase (claim 8)||any
(all independent claims)
|Plant cell comprising a chimeric gene||not claimed||not claimed||The chimeric gene contains one of the CaMV promoters and any antibiotic resistance gene (Claim 3)|
|An intermediate and a final plant transformation Ti plasmid having a chimeric gene||not claimed||not claimed||The intermediate and final Ti plasmid vectors contain a chimeric gene as mentioned above (Claims 6 & 9)|
|Particular group of plants having cells containing a chimeric gene differentiated dicotyledonous plants (Claim 12)||not claimed||not claimed||differentiated dicotyledonous plants (Claim 12)|