Bellows plungers having one or more helically extending features, pumps including such bellows plungers, and related methods
US 8,636,484 Lapsed on the fee recordLapsed Jan 28, 2022 on the fee record · From the USPTO record
20-year base term ends Jan 9, 2029
Second maintenance fee unpaid; grace period ended.
Jan 9, 2009
Jan 28, 2022
Jan 28, 2014
Dec 5, 2029
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Jan 9, 2009, when the earliest non-provisional application in its chain was filed (this one was filed Jan 8, 2010); a parent in its chain could not be resolved (the next row) | Jan 9, 2029 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +330 days, USPTO patent term adjustment record | Dec 5, 2029 | 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 | 1 of 3 maintenance fees paid | lapsed Jan 28, 2022 | High confidence |
| Computed term end | The steps above, in order | Jan 28, 2022 | 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.