Collateral for a security interest recorded May 2, 2013 (HSBC Bank USA, National Association).

Lapsed Apr 17, 2020 on the fee record · High confidence

Computed 20-year base term

Second maintenance fee unpaid; grace period ended.

Held by Semtech Canada Corporation

Filed Jun 15, 2009 as application 12/484,443 · Granted Apr 17, 2012

Base term, 20 years from filing, plus 173 days of patent term adjustment (USPTO delay)

Today

Lapsed Apr 17, 2020

2008 2028

Clock starts
Feb 11, 2008

No longer in force
Apr 17, 2020

Granted
Apr 17, 2012

Term would have run to
Aug 2, 2028

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

173

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.

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 2, 2028: its 20-year base term plus 173 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 Feb 11, 2008, when application 12/029,053, the earliest non-provisional in its chain, was filed (this one was filed Jun 15, 2009)	Feb 11, 2028	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+173 days, USPTO patent term adjustment record	Aug 2, 2028	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 Apr 17, 2020	High confidence
Computed term end	The steps above, in order	Apr 17, 2020	High confidence

This family

US 8,462,759	In force Dec 2031	Dec 2031
US 8,159,927	this patent Apr 2020	Apr 2020

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
Nov 2, 2009 Reel 23453, frame 229	Shakiba, Mohammad Hossein; Hudson, John; Macdougall, Jack; Rofheart, Martin; Lynch, David L.	Gennum Corporation	Assignment of Assignor's Interest
Jun 7, 2012 Reel 28333, frame 287	Gennum Corporation	Semtech Canada Inc.	Merger
Nov 20, 2012 Reel 29340, frame 83	Gennum Corporation	Semtech Canada Inc.	Corrective Assignment to Correct the Error Previously Recorded on Reel 028333 Frame 0287. Assignor(S) Hereby Confirms the Serial No. 13/309,951 Was Inadvertently Listed on the Request for Recordation.
Nov 26, 2012 Reel 29345, frame 302	Semtech Canada Inc.	Semtech Canada Corporation	Change of Name
May 2, 2013 Reel 30341, frame 99	Semtech Corporation; Semtech New York Corporation; Sierra Monolithics, Inc.	HSBC Bank USA, National Association	Security Agreement
Nov 17, 2016 Reel 40646, frame 799	Semtech Corporation; Semtech New York Corporation; Sierra Monolithics, Inc.; Semtech Ev, Inc.; Triune Systems, L.l.c.; Triune IP, LLC	HSBC Bank USA, National Association, as Administrative Agent	Security Interest
Feb 17, 2023 Reel 62781, frame 544	HSBC Bank USA, National Association, as Resigning Agent	JPMorgan Chase Bank, N.A., as Successor Agent	Assignment of Patent Security Interest Previously Recorded at Reel/Frame (040646/0799)
Jul 8, 2026 reel/frame not recorded	Jpmorgan Chase Bank, N.a.	Semtech Corporation	Release of Security Interest
Jul 8, 2026 reel/frame not recorded	Jpmorgan Chase Bank, N.a.	Sierra Monolithics, Inc.	Release of Security Interest
Jul 8, 2026 reel/frame not recorded	Jpmorgan Chase Bank, N.a.	Semtech Ev, Inc.	Release of Security Interest
Jul 8, 2026 reel/frame not recorded	Jpmorgan Chase Bank, N.a.	Triune Systems, L.l.c.	Release of Security Interest
Jul 8, 2026 reel/frame not recorded	Jpmorgan Chase Bank, N.a.	Triune IP, LLC	Release of Security Interest
Jul 8, 2026 reel/frame not recorded	Jpmorgan Chase Bank, N.a.	Semtech New York Corporation	Release of Security Interest
Jul 8, 2026 Reel 76364, frame 527	Jpmorgan Chase Bank, N.a.	Semtech Corporation; Sierra Monolithics, Inc.; Semtech Ev, Inc.; Triune Systems, L.l.c.; Triune IP, LLC; Semtech New York Corporation	Release of Security 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.

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

What's changing

Note

The 173 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Citations

later US patents cite this one

That is above the median of utility patents granted in 2012 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.

Transmit, Receive, and Cross-Talk Cancellation Filters for Back Channelling