Term ends no later than Sep 5, 2029 · Medium confidence
20-year base term ends Sep 5, 2029
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Sep 5, 2009
Sep 5, 2029
May 8, 2012
This patent's term is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. Confidence: Medium. from the record
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 5, 2009, when this application, 12/554,888, was filed | Sep 5, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than Sep 5, 2029 | Medium confidence |
This family
| US 8,176,284 | Lapsed on the fee record May 2024 | May 2024 |
| US 7,856,528 | In force Sep 2029 | Sep 2029 |
| US 8,176,360 | this patent no later than Sep 2029 | no later than Sep 2029 |
| US 7,818,525 | Lapsed on the fee record Oct 2018 | Oct 2018 |
| US 8,189,379 | Lapsed on the fee record May 2020 | May 2020 |
| US 8,775,772 | Lapsed on the fee record Jul 2018 | Jul 2018 |
| US 7,941,696 | Lapsed on the fee record May 2023 | May 2023 |
| US 8,190,842 | Lapsed on the fee record May 2020 | May 2020 |
Assignments
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Feb 3, 2010 Reel 23890, frame 97 | Frost, Holloway H.; Fuxa, James A.; Camp, Charles J. | Texas Memory Systems, Inc. | Assignment of Assignor's Interest |
| Mar 26, 2013 Reel 30081, frame 35 | Texas Memory Systems, Inc. | International Business Machines Corporation | Assignment of Assignor's Interest |
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.
What's changing
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Sep 5, 2029. We will not guess the cap.