Steel alloy, holders and holder details for plastic moulding tools, and tough hardened blanks for holders and holder details
US 8,808,472 Lapsed on the fee recordLapsed Aug 19, 2022 on the fee record · From the USPTO record
20-year base term ended Nov 22, 2021
Second maintenance fee unpaid; grace period ended.
Nov 22, 2001
Aug 19, 2022
Aug 19, 2014
Nov 12, 2024
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Nov 22, 2001, when the earliest non-provisional application in its chain was filed (this one was filed Sep 13, 2006); a parent in its chain could not be resolved (the next row) | Nov 22, 2021 | 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 | +1086 days, USPTO patent term adjustment record | Nov 12, 2024 | 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 2 maintenance fees paid | lapsed Aug 19, 2022 | High confidence |
| Computed term end | The steps above, in order | Aug 19, 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.