Also listed on Invertix Corporation, an earlier holder on the record. The recorded assignments below show how it moved.

Term ends Aug 25, 2033 · High confidence

Computed 20-year base term

Held by Parsons Corporation

Filed Feb 26, 2013 as application 13/777,610 · Granted Aug 18, 2015

Base term plus 180 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Term ends Aug 25, 2033

2013 2033

Clock starts
Feb 26, 2013

Term ends
Aug 25, 2033

Granted
Aug 18, 2015

base term patent term adjustment 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

180

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

None

Terminal disclaimer

No disclaimer on this record.

2 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.

Family applications on record here

Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

This patent's term runs 180 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Feb 26, 2013, when this application, 13/777,610, was filed	Feb 26, 2033	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+180 days, USPTO patent term adjustment record	Aug 25, 2033	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	2 of 3 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	Aug 25, 2033	High confidence

This family

US 6,839,554	Lapsed on the fee record Jan 2017	Jan 2017
Application 60/268,977	Provisional application no patent term	no patent term
Application 09/810,114	Abandoned not computed	not computed
Application 09/885,668	Abandoned not computed	not computed
US 6,668,167	Lapsed on the fee record Dec 2015	Dec 2015
Application 10/076,814	Abandoned not computed	not computed
US 8,340,197	In force Oct 2031	Oct 2031
US 8,391,376	In force Mar 2030	Mar 2030

8 of 12 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
Feb 26, 2013 Reel 29879, frame 618	Uhl, Brecken H.	Invertix Corporation	Assignment of Assignor's Interest
Sep 21, 2015 Reel 36609, frame 145	Invertix Corporation	Altamira Technologies Corporation	Assignment of Assignor's Interest
May 6, 2016 Reel 38484, frame 817	Altamira Technologies Corporation	Western Alliance Bank	Security Interest
Jul 24, 2019 Reel 49848, frame 85	Altamira Merger Sub, Inc.; Altamira Technologies Corporation; Altamira Intermediate Company II, Inc.; Apg Technologies, LLC; Prime Solutions LLC	Pennantpark Loan Agency Servicing, LLC	Assignment of Assignor's Interest
Jul 26, 2019 Reel 49867, frame 327	Western Alliance Bank	Altamira Technologies Corporation	Release of Security Interest
Sep 29, 2023 Reel 65074, frame 75	Altamira Technologies Corporation; Virginia Systems and Technology, Inc.	Capital One National Association, as Agent	Security Interest
Oct 2, 2023 Reel 65085, frame 729	Pennantpark Loan Agency Servicing, LLC	Altamira Technologies Corporation; Altamira Intermediate Company II, Inc.; Apg Technologies, LLC; Prime Solutions LLC	Release of Security Interest
Oct 2, 2023 reel/frame not recorded	Pennantpark Loan Agency Servicing, LLC	Altamira Technologies Corporation	Release of Security Interest
Oct 2, 2023 reel/frame not recorded	Pennantpark Loan Agency Servicing, LLC	Altamira Intermediate Company II, Inc.	Release of Security Interest
Oct 2, 2023 reel/frame not recorded	Pennantpark Loan Agency Servicing, LLC	Apg Technologies, LLC	Release of Security Interest
Oct 2, 2023 reel/frame not recorded	Pennantpark Loan Agency Servicing, LLC	Prime Solutions LLC	Release of Security Interest
Jun 10, 2026 Reel 74910, frame 324	Altamira Technologies Corporation	Parsons Government Services Inc.	Assignment of Assignor's Interest
Jun 11, 2026 Reel 74928, frame 26	Parsons Government Services Inc.	Parsons 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

Aug 2033

Term ends Aug 25, 2033. Maintenance fees still fall due before then

Note

The 180 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Citations

later US patent cites this one

That is below the median of utility patents granted in 2015 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.

In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.

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