Lapsed Sep 22, 2017 on the fee record · High confidence
20-year base term ended Nov 17, 2025
Second maintenance fee unpaid; grace period ended.
Held by Contactwave LLC
Filed May 24, 2006 as application 11/308,900 · Granted Sep 22, 2009
Base term, 20 years from filing, plus 162 days of patent term adjustment (USPTO delay)
Today
Lapsed Sep 22, 2017
2005
2026
Clock starts
Nov 17, 2005
Nov 17, 2005
No longer in force
Sep 22, 2017
Sep 22, 2017
Granted
Sep 22, 2009
Sep 22, 2009
Term would have run to
Apr 28, 2026
Apr 28, 2026
base term
patent term adjustment
after the term ends
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
162
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
13
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Apr 28, 2026: its 20-year base term plus 162 days of term adjustment for prosecution delay. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own 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, 20 years from filing | Clock starts Nov 17, 2005, when application 11/164,318, the earliest non-provisional in its chain, was filed (this one was filed May 24, 2006) | Nov 17, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +162 days, USPTO patent term adjustment record | Apr 28, 2026 | 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 Sep 22, 2017 | High confidence |
| Computed term end | The steps above, in order | Sep 22, 2017 | High confidence |
This family
| US 8,254,893 | Lapsed on the fee record Aug 2020 | Aug 2020 |
| US 7,533,343 | Term ended Sep 2026 | Sep 2026 |
| US 7,593,721 | this patent Sep 2017 | Sep 2017 |
| US 8,180,329 | Lapsed on the fee record May 2024 | May 2024 |
| US 10,122,845 | Grace period ended Nov 2028 | Nov 2028 |
| US 8,848,892 | Lapsed on the fee record Sep 2022 | Sep 2022 |
| Application 12/122,705 | Abandoned not computed | not computed |
| Application 12/140,684 | Abandoned not computed | not computed |
8 of 13 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
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 |
|---|---|---|---|
| Oct 12, 2024 Reel 68880, frame 971 | Ratnakar, Nitesh, DR. | Mira Advanced Technology Systems, Inc. | Assignment of Assignor's Interest |
| Jan 8, 2025 Reel 69778, frame 811 | Mira Advanced Technology Systems, Inc. | Contactwave LLC | 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
Note
The 162 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
21
later US patents cite this one
That is above the median of utility patents granted in 2009 in our data, the only group it is compared against.
How we rank
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.