Flatline Ops, Inc.

10 patents currently held · Updated Nov 14, 2026

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

Ending by 2030

Dec 2030

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 Feb 11, 2027
The maintenance fee for Sliding sight level for firearm (US 9,103,630) comes due Feb 11, 2027. Unpaid by Aug 11, 2027, it lapses early.
1 fee due Sep 3, 2027
The maintenance fee for Level indicator for aiming systems (US 10,578,402) comes due Sep 3, 2027. Unpaid by Mar 3, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

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.

Showing 1 to 10 of 10

Patent	Title	Status	Expires	Confidence
US 9,500,443	Sight level for firearm In force Ends no later than Dec 20, 2030 · From the USPTO record	In force	Ends no later than Dec 20, 2030	From the USPTO record
US 8,819,985	Sight level for firearm In force Term ends May 13, 2031 · From the USPTO record	In force	Term ends May 13, 2031	From the USPTO record
US 9,103,630	Sliding sight level for firearm In force Term ends May 15, 2033 · From the USPTO record	In force	Term ends May 15, 2033	From the USPTO record
US D906,467	Level indicator for telescopic sights In force Term ends Dec 29, 2035 · From the USPTO record	In force	Term ends Dec 29, 2035	From the USPTO record
US D907,160	Lever for optical scopes In force Term ends Jan 5, 2036 · From the USPTO record	In force	Term ends Jan 5, 2036	From the USPTO record
US 10,578,402	Level indicator for aiming systems In force Term ends Nov 9, 2037 · From the USPTO record	In force	Term ends Nov 9, 2037	From the USPTO record
US 10,914,553	Level indicator for aiming systems In force Term ends Nov 9, 2037 · From the USPTO record	In force	Term ends Nov 9, 2037	From the USPTO record
US 11,092,437	Level indicator for telescopic sights In force Term ends Jun 18, 2040 · From the USPTO record	In force	Term ends Jun 18, 2040	From the USPTO record
US 11,365,968	Level indicator for telescopic sights In force Term ends Jun 18, 2040 · From the USPTO record	In force	Term ends Jun 18, 2040	From the USPTO record
US 11,237,379	Lever assembly for optical scopes In force Term ends Jan 25, 2041 · From the USPTO record	In force	Term ends Jan 25, 2041	From the USPTO record

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.

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Published applications

Every application published under this name has become a patent.