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US Patents

2,2-Difluoro-13,14-didehydro-PGE.sub.1 compounds

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

Patent

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Bloory idea and bloory practical use

Very broad patent, without practical use

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Patented to preserve knowledge

Defensive patent

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Manufacturing base and used to stop/slow down rivals

Serves only patent trolls

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