Disk, and counting observation apparatus for counting and observing cells through optical microscope by use of the disk
US 8,568,660 Lapsed on the fee recordLapsed Oct 29, 2017 on the fee record · From the USPTO record
20-year base term ended Jun 8, 2026
First maintenance fee unpaid; grace period ended.
Jun 8, 2006
Oct 29, 2017
Oct 29, 2013
Sep 21, 2030
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Jun 8, 2006, when this application, 11/448,878, was filed | Jun 8, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1566 days, USPTO patent term adjustment record | Sep 21, 2030 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | lapsed Oct 29, 2017 | High confidence |
| Computed term end | The steps above, in order | Oct 29, 2017 | From the USPTO record |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.