Extreme Technologies, LLC

13 patents currently held · Updated Nov 14, 2026

17 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.

Recorded as renamed to Bowtech, Inc. (2013)

Ending by 2030

Apr 2032

Next term end

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036203720382039204020412042204320442045

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 Apr 20, 2027
The maintenance fee for Wellbore Conditioning System (US 9,163,460) comes due Apr 20, 2027. Unpaid by Oct 20, 2027, it lapses early.
1 fee due Jun 17, 2027
The maintenance fee for Method and Apparatus for Reaming Well Bore Surfaces Nearer the Center of Drift (US 10,508,497) comes due Jun 17, 2027. Unpaid by Dec 17, 2027, it lapses early.
1 fee due Oct 21, 2027
The maintenance fee for Low-friction, abrasion resistant replaceable bearing surface (US 10,626,922) comes due Oct 21, 2027. Unpaid by Apr 21, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

1 term has ended since Aug 16, 2026

Patents held now

Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.

Patent	Title	Status	Expires	Confidence
US 8,813,877	Method and apparatus for reaming well bore surfaces nearer the center of drift In force Ends no later than Apr 6, 2032 · From the USPTO record	In force	Ends no later than Apr 6, 2032	From the USPTO record
US 8,851,205	Method and apparatus for reaming well bore surfaces nearer the center of drift In force Ends no later than Apr 6, 2032 · From the USPTO record	In force	Ends no later than Apr 6, 2032	From the USPTO record
US 8,752,649	Method and apparatus for reaming well bore surfaces nearer the center of drift In force Term ends Apr 9, 2032 · From the USPTO record	In force	Term ends Apr 9, 2032	From the USPTO record
US 11,156,035	Method and Apparatus for Reaming Well Bore Surfaces Nearer the Center of Drift In force Term ends Jul 5, 2032 · Medium confidence	In force	Term ends Jul 5, 2032	Medium confidence
US 10,508,497	Method and Apparatus for Reaming Well Bore Surfaces Nearer the Center of Drift In force Ends no later than Oct 3, 2032 · Low confidence	In force	Ends no later than Oct 3, 2032	Low confidence
US 9,010,370	Valve Assembly In force Term ends Jul 12, 2033 · High confidence	In force	Term ends Jul 12, 2033	High confidence
US 9,410,637	Valve assembly In force Ends no later than Jul 12, 2033 · From the USPTO record	In force	Ends no later than Jul 12, 2033	From the USPTO record
US 10,161,530	Valve assembly In force Ends no later than Jul 12, 2033 · From the USPTO record	In force	Ends no later than Jul 12, 2033	From the USPTO record
US 9,488,229	Low-Friction, Abrasion Resistant Replaceable Bearing Surface In force Term ends Sep 4, 2033 · Medium confidence	In force	Term ends Sep 4, 2033	Medium confidence
US 10,626,922	Low-friction, abrasion resistant replaceable bearing surface In force Term ends Sep 4, 2033 · From the USPTO record	In force	Term ends Sep 4, 2033	From the USPTO record

10 of 13 patents shown.

Pro members see all 13.

Pro members: see all 13 patents

Also on record, not counted in the 13: 17 patents in force now held by others · 6 lapsed for an unpaid fee · 10 ended at full term. List them

Sources and methods

Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand. How this record was built

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

Published applications

US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.

9 no status recorded

List them