Question: Where can I find the expiration date of my respirator?

Answer passage (source: CDC):
page_title: Personal Protective Equipment: Questions and Answers
section_headers: Respirators
My N95 respirator has an exhalation valve, is that okay?
section_content: An N95 respirator with an exhalation valve does provide the same level of
protection to the wearer as one that does not have a valve. The presence of an
exhalation valve reduces exhalation resistance, which makes it easier to
breathe (exhale). Some users feel that a respirator with an exhalation valve
keeps the face cooler and reduces moisture build up inside the facepiece.
However, respirators with exhalation valves should not be used in situations
where a sterile field must be maintained (e.g., during an invasive procedure
in an operating or procedure room) because the exhalation valve allows
unfiltered exhaled air to escape into the sterile field.

Reviewer feedback on this answer:
Answer refers only to usage of the N95 and the exhalation valve and has nothing to do with expiration date of the product itself.
This information does not provide answer to the question. The question is asking about expiration date of respirator and this answer is explaining about the level of protection of respirators with and without exhalation valve.

Reviewer ratings:
Bad
Bad

Answer passage (source: CDC):
page_title: Personal Protective Equipment: Questions and Answers
section_headers: Respirators
What do I do with an expired respirator?
section_content: In times of increased demand and decreased supply, consideration can be made
to use N95 respirators past their intended shelf life. However, the potential
exists that the respirator will not perform to the requirements for which it
was certified. Over time, components such as the strap and nose bridge may
degrade, which can affect the quality of the fit and seal. Prior to use of N95
respirators, the HCP should inspect the respirator and perform a seal check.
Additionally, expired respirators may potentially no longer meet the
certification requirements set by NIOSH. For further guidance, visit Release
of Stockpiled N95 Filtering Facepiece Respirators Beyond the Manufacturer-
Designated Shelf Life: Considerations for the COVID-19
Response .

Reviewer feedback on this answer:
Answer does refer to expiration of N95 respirators but does not answer question as to how the expiration date can be ascertained.
This information does not answer the question. This answer provides information on N95 respirator usage past their intended shelf life and does not explain where to find the expiration date of a respirator.

Reviewer ratings:
Could be Improved
Bad

Answer passage (source: CDC):
page_title: Personal Protective Equipment: Questions and Answers
section_headers: Respirators
How do I know if my respirator is expired?
section_content: NIOSH does not require approved N95 filtering facepiece respirators (FFRs) be
marked with an expiration date. If an FFR does not have an assigned expiration
date, you should refer to the user instructions or seek guidance from the
specific manufacturer on whether time and storage conditions (such as
temperature or humidity) are expected to have an effect on the respirator’s
performance and if the respirators are nearing the end of their shelf life.

Reviewer feedback on this answer:
This answer does not fully answer the question directly. However, this answer provides explanation that NIOSH does not require approved respirators to be marked with an expiration date. And should someone possesses a respirator without an expiration date, this answer provides direction of what steps to take to determine the shelf life.
While this is not a direct answer it at least sends the requester in the right direction by looking to the manufacturer for information on their specific respirator.

Reviewer ratings:
Could be Improved
Excellent