Term ends Mar 21, 2025
Statutory term ends Mar 21, 2025
Base term, 20y-from-earliest-nonprovisional
Today
20y-from-earliest-nonprovisional
Expired Mar 2025
2005
2026
Clock starts
Mar 21, 2005
Mar 21, 2005
Granted
Apr 21, 2009
Apr 21, 2009
Term ends
Mar 21, 2025
Mar 21, 2025
0
Days of PTA
14
Applications in this family
This patent's term is the statutory base term, with no adjustment for prosecution delay. All three maintenance fees are paid, so nothing but the term itself will end it. Confidence: High. from the record
How this date was computed
Every step shows its rule, its input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20y-from-earliest-nonprovisional | Clock starts Mar 21, 2005 | Mar 21, 2025 | High |
| Continuity chain | Every parent in the chain resolved | no change | High |
| Patent term adjustment | None on file | no change | High |
| Terminal disclaimer cap | None on record | no cap applied | High |
| Patent term extension | None on file | no change | High |
| Fee events | 3 of 3 maintenance fees paid | expired-term | High |
| Computed term end | The steps above, in order | Mar 21, 2025 | High |
The computation, verbatim
base=20y-from-earliest-nonprovisional: 2005-03-21+20y | =2025-03-21 | PTA+0d=2025-03-21 | PTE:none | TD:none | paid 4yr@2012-09-19,8yr@2016-10-21,12yr@2020-09-30 | status=expired-term@2025-03-21
This family
| US 7,595,580 | in-force | Apr 2027 |
| US 7,521,840 | expired-term | Apr 2026 |
| Application 11/361,703 | abandoned | not computed |
| Application 60/776,861 | pending | not computed |
| US 7,626,319 | expired-term | Mar 2025 |
| US 7,915,789 | expired-term | Aug 2025 |
| US 7,750,532 | expired-term | Mar 2025 |
| US 7,521,847 | this patent | Mar 2025 |
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| May 14, 2007 reel/frame not recorded | Heim, Jonathan R. | Artificial Muscle, Inc. | Assignment of Assignor's Interest |
| May 20, 2010 reel/frame not recorded | Artificial Muscle, Inc. | Bayer Materialscience AG | Assignment of Assignor's Interest |
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What's changing
Citations
25
later US patents cite this one
That is top 25% of utility patents granted in 2009 in our data, the only group it is compared against.
How we rank
Every date shows its work: base rule, PTA, PTE, disclaimer caps, fee overlay, 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.