Q: Patent expiration date for Welch Allyn Kleenspec Universal Otoscope speculum, possibly patent # US 6,648,845 B2 ?
Question answered: patent # US 7,354,399 B2 has patent date April 8, 2008, so expiration date is April 8, 2028.
A:
US664884
That's Method and apparatus for determining hemodialysis parameters.
1998-01-07
Application filed by Fresenius Medical Care North America
1998-01-07
Priority to US09/003,798
2003-11-18
Publication of US6648845B1
2003-11-18
Application granted
2018-01-07
Anticipated expiration
Status
Expired - Lifetime
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