Scientific classification of goods governs excise duty; polyester chips remained taxable despite their trade description.

Where a tariff entry classifies goods by scientific and chemical description, the product is assessed by its technical identity rather than by trade nomenclature alone. Polyester chips of textile grade were treated as a saturated polyester and polycondensation product falling within Item 15A, because the entry covered artificial or synthetic resins and plastic materials. Their market description as fibre grade chips, or their alleged unsuitability for moulding or film-making, did not take them outside the levy. On the refund aspect, any claim would in principle be limited by limitation, while unjust enrichment was not treated as a complete bar.

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Issues: Whether polyester chips of textile grade manufactured by the petitioners were assessable to excise duty under Item 15A of Schedule I to the Central Excises and Salt Act, 1944, and whether any refund could be directed for duty already paid.

Analysis: The product in question was found to be a saturated polyester and a polycondensation product. Item 15A covered artificial or synthetic resins and plastic materials, and the Court held that the entry was framed in technical and scientific terms, so the scope of the item had to be determined by that character rather than by trade nomenclature alone. The distinction between synthetic resins and plastics was treated as material, and the fact that the chips were known in trade as fibre grade chips did not take them out of the entry. The alternative challenge based on market description and alleged unsuitability for moulding or film-making was rejected. On the refund aspect, the Court indicated that any refund, if otherwise due, would be confined at most to the period not barred by limitation and that the plea of unjust enrichment did not defeat the claim in principle.

Conclusion: The polyester chips were held to fall within Item 15A and to be liable to excise duty; the principal claim failed, and the petition was dismissed.

Final Conclusion: The levy of excise duty on the petitioners' polyester chips was upheld, and no broader relief was granted on the challenge to the assessment.

Ratio Decidendi: Where a tariff item classifies goods by scientific and chemical description, its scope is to be determined by that technical identity, and a product answering that description remains dutiable notwithstanding a different trade name or its use as an intermediate material.

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