The Patent Finder
US

System and Method for Positioning Using Hybrid Spectral Compression and Cross Correlation Signal Processing

US 9,097,783 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods
Collateral for a security interest recorded Mar 3, 2016 (Citibank N.A.).

Lapsed Aug 4, 2019 on the fee record · Medium confidence

Why Medium: A terminal disclaimer is on file (approved) with no resolved reference, so the term may end earlier.

First maintenance fee unpaid; grace period ended.

Filed Jan 23, 2012 as application 13/356,281 · Granted Aug 4, 2015
Base term, 20 years from filing, plus 643 days of patent term adjustment (USPTO delay)
Today
Lapsed Aug 4, 2019
2007 2029
Clock starts
Apr 6, 2007
No longer in force
Aug 4, 2019
Granted
Aug 4, 2015
Term would have run to
Jan 8, 2029
base term patent term adjustment after the term ends Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
643
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
0 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.
12
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 Jan 8, 2029: its 20-year base term plus 643 days of term adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. Confidence: Medium. 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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Apr 6, 2007, when application 11/697,575, the earliest non-provisional in its chain, was filed (this one was filed Jan 23, 2012)Apr 6, 2027High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+643 days, USPTO patent term adjustment recordJan 8, 2029High confidence
Terminal disclaimer capDisclaimer on file (approved), reference document not resolvedno cap applied, and none guessedMedium confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events0 of 3 maintenance fees paidlapsed Aug 4, 2019High confidence
Computed term endThe steps above, in orderAug 4, 2019Medium confidence

This family

US 7,511,662In force
Apr 2027
Apr 2027
Application PCT/US2007/066639PCT application
no patent term
no patent term
US 7,916,074Lapsed on the fee record
Mar 2019
Mar 2019
Application 13/029,966Abandoned
not computed
not computed
US 9,239,376In force
Jul 2034
Jul 2034
US 9,097,783this patent
Aug 2019
Aug 2019
Application PCT/US2013/021986PCT application
no patent term
no patent term
US 9,658,341In force
Feb 2030
Feb 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.
RecordedAssignorAssigneeConveyance
Feb 13, 2012
Reel 27696, frame 897
Mathews, Michael B.; Macdoran, Peter F.Loctronix CorporationAssignment of Assignor's Interest
Jan 15, 2013
reel/frame not recorded
Loctronix CorporationMathews, Jerome E.Security Agreement
Jan 15, 2013
reel/frame not recorded
Loctronix CorporationAas, DavidSecurity Agreement
Jan 15, 2013
reel/frame not recorded
Loctronix CorporationDavis, Thomas C.Security Agreement
Jan 15, 2013
reel/frame not recorded
Loctronix CorporationEngenex Technologies LLCSecurity Agreement
Jan 15, 2013
reel/frame not recorded
Loctronix CorporationHawkeye Investments LLCSecurity Agreement
Jan 15, 2013
reel/frame not recorded
Loctronix CorporationHawkeye Investments II LLCSecurity Agreement
Jan 15, 2013
Reel 29627, frame 645
Loctronix CorporationMathews, Jerome E.; Aas, David; Davis, Thomas C.; Engenex Technologies LLC; Hawkeye Investments LLC; Hawkeye Investments II LLCSecurity Agreement
Jun 1, 2015
Reel 35758, frame 620
Mathews, Jerome E.; Aas, David; Davis, Thomas C.; Engenex Technologies LLC; Hawkeye Investments LLC; Hawkeye Investments II LLCLoctronix CorporationRelease of Security Interest
Jun 18, 2015
Reel 35862, frame 44
Loctronix CorporationTelecommunication Systems, Inc.Assignment of Assignor's Interest
Mar 3, 2016
Reel 37993, frame 1
Comtech Ef Data Corp.; Comtech Xicom Technology, Inc.; Comtech Mobile Datacom Corporation; Telecommunication Systems, Inc.Citibank N.a., As Administrative AgentSecurity Agreement

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.

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited