Based on the provided legal document, the following key points emerge:

1. The appellant, Cadila Healthcare Ltd., has used the trademark "Sugar Free" since 1988 for its artificial sweetener product containing Aspartame, and has acquired significant market share and goodwill associated with this mark (!) (!) (!) (!) .

2. The appellant contends that "Sugar Free" is a distinctive, suggestive mark that has acquired secondary meaning and is therefore entitled to protection as a trademark, especially given its extensive use and consumer recognition (!) (!) (!) (!) .

3. The respondent adopted the same phrase "Sugar Free" for their frozen dessert product, which the appellant claims is a deliberate attempt to infringe upon its trademark rights and to mislead consumers, constituting passing off and dishonest conduct (!) (!) (!) (!) .

4. The court recognized that "Sugar Free" is a common English phrase that is descriptive in nature and widely used in relation to food products that do not contain sugar. It is not inherently distinctive and has not necessarily acquired a secondary meaning outside the specific context of the appellant's sugar substitute products (!) (!) .

5. The court noted that the use of "Sugar Free" by the respondent was in a descriptive sense and not as a trademark, especially when used in a manner that emphasizes the characteristic of the product rather than indicating source or origin (!) .

6. The court emphasized that the protection of a trademark must be balanced against the public interest in free use of common descriptive terms, particularly when such terms are in widespread use across the industry and in the language generally (!) (!) .

7. The court acknowledged that even if "Sugar Free" has acquired some secondary meaning within the niche market of artificial sweeteners, this protection does not extend to all food products or to the use of the phrase in a purely descriptive context by competitors (!) .

8. The court found that the respondent's use of "Sugar Free" in packaging and advertising was primarily descriptive, aimed at highlighting the product characteristic, and not intended to mislead or deceive consumers into believing there was a connection with the appellant (!) (!) .

9. The court dismissed the appeal and cross objections, concluding that at the interim stage, the respondent's use did not amount to infringement or passing off, given the descriptive nature of the phrase and the manner of its use (!) (!) .

10. The court also considered the importance of the manner and prominence of the mark's depiction, including font size and style, and upheld restrictions on the use of "Sugar Free" in a conspicuously larger font to prevent misleading impressions (!) (!) .

In summary, the court's decision underscores that common descriptive terms like "Sugar Free" are not inherently registrable as trademarks unless they have acquired distinctiveness in relation to specific products and consumer perception. The respondent's use, aimed at describing product features, does not constitute trademark infringement or passing off, especially when used in a manner that clearly indicates the characteristic rather than origin.