The Patent Finder
US

Telephone System Having Multiple Distinct Sources and Accessories Therefor

US 8,238,328 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods
Collateral for a security interest recorded Sep 9, 2014 (Cppib Credit Investments Inc., as Lender).

Lapsed Aug 7, 2016 on the fee record · High confidence

First maintenance fee unpaid; grace period ended.

Filed Dec 12, 2006 as application 11/636,998 · Granted Aug 7, 2012
Base term, 20 years from filing, plus 1638 days of patent term adjustment (USPTO delay)
Today
Lapsed Aug 7, 2016
2004 2028
Clock starts
Feb 24, 2004
No longer in force
Aug 7, 2016
Granted
Aug 7, 2012
Term would have run to
Aug 19, 2028
base term patent term adjustment after the term ends 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
1,638
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
6
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 Aug 19, 2028: its 20-year base term plus 1638 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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Feb 24, 2004, when application PCT/IL2004/000178, the earliest non-provisional in its chain, was filed (this one was filed Dec 12, 2006)Feb 24, 2024High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+1638 days, USPTO patent term adjustment recordAug 19, 2028High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events0 of 3 maintenance fees paidlapsed Aug 7, 2016High confidence
Computed term endThe steps above, in orderAug 7, 2016High confidence

This family

US 7,746,905In force
Feb 2029
Feb 2029
US 8,238,328this patent
Aug 2016
Aug 2016
US 7,656,904Lapsed on the fee record
Feb 2022
Feb 2022
US 7,738,453Term ended
Oct 2025
Oct 2025
Application 11/712,508Abandoned
not computed
not computed
5 of 6 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
Mar 25, 2009
Reel 22449, frame 101
Serconet Ltd.Mosiad Technologies IncorporatedAssignment of Assignor's Interest
Jan 10, 2012
Reel 27512, frame 196
658276 N.B. Ltd.; 658868 N.B. Inc.; MOSAID Technologies IncorporatedRoyal Bank of CanadaU.S. Intellectual Property Security Agreement (for Non-U.S. Grantors) - Short Form
Feb 10, 2012
Reel 27683, frame 465
Binder, YehudaSerconet Ltd.Assignment of Assignor's Interest
Mar 5, 2013
Reel 29928, frame 585
Serconet Ltd.MOSAID Technologies IncorporatedCorrective Assignment to Correct the Assignee Name from Mosiad Technologies Incorporated to Mosaid Technologies Incorporated Previously Recorded on Reel 022449 Frame 0101. Assignor(S) Hereby Confirms the Corrective Assignment to Correct the Assignee's Name Previously Recorded on Reel/Frame 022449/0101.
Mar 13, 2014
Reel 32439, frame 638
MOSAID Technologies IncorporatedConversant Intellectual Property Management Inc.Change of Name
Apr 7, 2014
Reel 32621, frame 650
Serconet Ltd.MOSAID Technologies IncorporatedCorrective Assignment to Correct the Incorrect Patent Number 7,480,709 and Serial Number 10/998,565 Previously Recorded on Reel 022449 Frame 0101. Assignor(S) Hereby Confirms the Assignment of Assignor's Interest (SEE Document for Details)..
Aug 7, 2014
Reel 33484, frame 344
Royal Bank of CanadaConversant Intellectual Property Management Inc.; Conversant IP N.B. 868 Inc.; Conversant IP N.B. 276 Inc.Release of Security Interest
Aug 7, 2014
reel/frame not recorded
Royal Bank of CanadaConversant Intellectual Property Management Inc.Release of Security Interest
Aug 7, 2014
reel/frame not recorded
Royal Bank of CanadaConversant IP N.B. 868 Inc.Release of Security Interest
Aug 7, 2014
reel/frame not recorded
Royal Bank of CanadaConversant IP N.B. 276 Inc.Release of Security Interest
Sep 3, 2014
Reel 33678, frame 96
Conversant Intellectual Property Management Inc.Conversant Intellectual Property Management Inc.Change of Address
Sep 9, 2014
Reel 33706, frame 367
Conversant Intellectual Property Management Inc.Cppib Credit Investments Inc., as Lender; Royal Bank of Canada, as LenderU.S. Patent Security Agreement (for Non-U.S. Grantors)
Sep 9, 2014
reel/frame not recorded
Conversant Intellectual Property Management Inc.Cppib Credit Investments Inc., as LenderU.S. Patent Security Agreement (for Non-U.S. Grantors)
Sep 9, 2014
reel/frame not recorded
Conversant Intellectual Property Management Inc.Royal Bank of Canada, as LenderU.S. Patent Security Agreement (for Non-U.S. Grantors)
Oct 12, 2018
Reel 47645, frame 424
Royal Bank of Canada, as LenderConversant Intellectual Property Management Inc.Release of U.S. Patent Agreement (for Non-U.S. Grantors)

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 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited