EP0548015A1 — Tetramethylpiperidine compounds for use as stabilisers for organic materials
Assigned to BASF Schweiz AG · Expires 1993-06-23 · 33y expired
What this patent protects
The present invention relates to novel tetramethylpiperidine compounds of the formula (I) in which R 1 is e.g. hydrogen or methyl, R 2 and R 3 are e.g. -(CH 2 ) 2 -, R 4 is e.g. -CO-, -COCO- or -COCH 2 CO-, n is e.g. 1 and R 5 is e.g. hydrogen or allyl. These comp…
USPTO Abstract
The present invention relates to novel tetramethylpiperidine compounds of the formula (I) in which R 1 is e.g. hydrogen or methyl, R 2 and R 3 are e.g. -(CH 2 ) 2 -, R 4 is e.g. -CO-, -COCO- or -COCH 2 CO-, n is e.g. 1 and R 5 is e.g. hydrogen or allyl. These compounds are suitable for use as light stabilisers, heat stabilisers and oxidation stabilisers for organic materials.
Drugs covered by this patent
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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