User talk:Bluerasberry/Product expiration

More sources
I wanted more sources about product expiration. I checked the works cited by this publication. Judging by the titles, none of these cited works have product expiration as their focus. The closest matches are some papers discussing expired drugs. As this paper is 2005 and the cited sources are older, I thought not to follow up.

 Blue Rasberry  (talk)  20:32, 4 May 2017 (UTC)

Other uses of the term "expiration"
I struggled with thinking about what to title this article. The most developed related article is currently called "shelf life" and mostly refers to food, but also includes some general product expiration. "Expiration" is a disambiguation page. It mentions "expiration of copyright", a concept which does not have its own Wikipedia article. I would not classify "expiration of copyright" or "expiration of patent" as a type of "product expiration", because I have never heard of either being imagined as products.

Subscriptions, as to websites or magazines, are said to expire, but that expiration is in the sense of an end of contact and not a degrading of the product for passing of time.

The Harcar paper cited examines expiration of food, drugs, and camera film. When I titled this article, I was trying to express the concept of such consumer products having a date after which they could be physically degraded because of the passing of time. I wished to include that meaning and exclude other metaphorical concepts of "expire".  Blue Rasberry  (talk)  20:44, 4 May 2017 (UTC)

Warranty
I considered whether a warranty was a type of product expiration. I think it is not. Product expiration expresses whether the manufacture promises that a product is as advertised at the time of purchase. A warranty is a further promise that the consumer can use a product for some additional amount of time.  Blue Rasberry  (talk)  20:47, 4 May 2017 (UTC)