71 patents currently held

2 more in force are now held by other companies

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

2 more records may belong here and await a decision; they are not counted.

The next term ends in Feb 2027. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Feb 2027

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042204320442045

notable patents fee due within 90 days all others 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

Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank

Notable

Chain Link Sharpening Method and Apparatus US 8,746,118

Cited by 23 later US patents, top 25% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032.

Ends Aug 2032 · High confidence Also notable

Apparatus, Method, and System for Orienting a Saw Chain Link on a Sprocket US 9,038,519

Granted 2015 and renewed at every maintenance window due so far. Protection runs to 2033.

Ends Mar 2033 · High confidence Also notable

Utility Chain Cutter US 8,651,005

Renewed at every maintenance window since the 2014 grant; no more fees are due before its term ends in 2030.

Ends Dec 2030 · High confidence

Fee deadlines

Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.

1 fee due Nov 26, 2026
The maintenance fee for Apparatus, Method, and System for Orienting a Saw Chain Link on a Sprocket (US 9,038,519) comes due Nov 26, 2026. Unpaid by May 26, 2027, it lapses early.
1 fee due Dec 4, 2026
The maintenance fee for Blade Pin and Associated Cutting Element (US 10,306,832) comes due Dec 4, 2026. Unpaid by Jun 4, 2027, it lapses early.
1 fee due Jan 9, 2027
The maintenance fee for High Stability Saw Chain (US 10,343,302) comes due Jan 9, 2027. Unpaid by Jul 9, 2027, it lapses early.
2 fees due Mar 10 to 22, 2027 · next Mar 10
3 fees due May 5 to 26, 2027 · next May 5
2 fees due Sep 1 to 12, 2027 · next Sep 1

Which patents, and when each one lapses · Pro

Recent changes

2 terms have ended since Aug 16, 2026

What they patent

The 5 largest of its 61 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Precision Super Seeder	3 in force	to Mar 2033
Clutched Driveline for Wings on Flex Wing Cutter	2 in force	to May 2042
Saw Chain Link with One or More Oversized Rivet Holes	2 in force	to Mar 2038
Abrasive Saw Chain	2 in force	to Dec 2036
Dresser Drive Link for Saw Chain	2 in force	to Sep 2033

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 7,563,064	Shear Resistant Rivet and Saw Chain In force Term ends Feb 21, 2027 · High confidence	In force	Term ends Feb 21, 2027	High confidence
US D676,883	Log Splitting Device In force Term ends Feb 26, 2027 · High confidence	In force	Term ends Feb 26, 2027	High confidence
US 7,637,192	Saw Chain Drive Link with Tail In force Term ends Oct 23, 2027 · High confidence	In force	Term ends Oct 23, 2027	High confidence
US 8,006,598	Saw Chain Drive Link with Tail In force Term ends Oct 23, 2027 · High confidence	In force	Term ends Oct 23, 2027	High confidence
US 7,669,395	Flip Up Arrangement for a Mower Deck In force Term ends May 25, 2028 · High confidence	In force	Term ends May 25, 2028	High confidence
US D706,592	String Trimmer In force Term ends Jun 10, 2028 · High confidence	In force	Term ends Jun 10, 2028	High confidence
US D709,742	Reciprocating Trimmer Handle In force Term ends Jul 29, 2028 · High confidence	In force	Term ends Jul 29, 2028	High confidence
US 8,555,869	Saw Chain with Defined Pitch In force Term ends Aug 22, 2028 · High confidence	In force	Term ends Aug 22, 2028	High confidence
US 8,136,436	Saw Chain Link with Offset Footprint In force Term ends Sep 17, 2028 · High confidence	In force	Term ends Sep 17, 2028	High confidence
US D720,193	Reciprocating Trimmer Body In force Term ends Dec 30, 2028 · High confidence	In force	Term ends Dec 30, 2028	High confidence

10 of 71 patents shown.

Pro members see all 71.

Pro members: see all 71 patents

Also on record, not counted in the 71: 2 patents in force now held by others · 45 patents ended · 10 applications pending · 20 applications abandoned. List them

Sources and methods

Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built

Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.

Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

Export every term end as CSV · Pro

Oregon Tool, Inc.