Uninterrupted Alternating Air Circulation for Use in Lumber Kilns
US 9,874,397 Surrendered on reissueSurrendered on reissue Sep 29, 2020 · Medium confidence
20-year base term ends Mar 14, 2033
Why Medium: No fee event states this; the fee state is read from the payments the fee record holds.
Surrendered on reissue Sep 29, 2020 · its term and maintenance fees continue in US RE48,227.
Mar 14, 2013
Sep 29, 2020
Jan 23, 2018
Dec 7, 2033
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Mar 14, 2013, when the earliest non-provisional application in its chain was filed (this one was filed Oct 28, 2015) | Mar 14, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +268 days, USPTO patent term adjustment record | Dec 7, 2033 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,200,834) | resolves to Dec 7, 2033, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | No fee events in USPTO's record of this patent. A gap in the record, not evidence of lapse | no change | Medium confidence |
| Reissue | US RE48,227 issued Sep 29, 2020, and this patent's term continues in it (35 U.S.C. 251, 252) | surrendered Sep 29, 2020 | High confidence |
| Surrendered on reissue | The steps above, in order | Sep 29, 2020 | Medium confidence |
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.