Ad-II Engineering Inc.

9 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 2036

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 15, 2027
The maintenance fee for Easy-adjustment bicycle gear-shifting system (US 10,442,497) comes due Apr 15, 2027. Unpaid by Oct 15, 2027, it lapses early.
2 fees due May 14, 2027
1 fee due Jun 5, 2027
The maintenance fee for Rear derailleur (US 11,834,131) comes due Jun 5, 2027. Unpaid by Dec 6, 2027, it lapses early.
1 fee due Aug 6, 2027
The maintenance fee for Bicycle front derailleur (US 11,891,155) comes due Aug 6, 2027. Unpaid by Feb 7, 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 9 of 9

Patent	Title	Status	Expires	Confidence
US 10,124,857	Clutch unit of bicycle derailleur In force Term ends Dec 26, 2036 · From the USPTO record	In force	Term ends Dec 26, 2036	From the USPTO record
US 10,442,497	Easy-adjustment bicycle gear-shifting system In force Term ends Jul 26, 2037 · From the USPTO record	In force	Term ends Jul 26, 2037	From the USPTO record
US 10,894,576	Bicycle rear derailleur In force Term ends Aug 2, 2039 · From the USPTO record	In force	Term ends Aug 2, 2039	From the USPTO record
US 11,814,138	Rear derailleur In force Term ends Jun 28, 2042 · From the USPTO record	In force	Term ends Jun 28, 2042	From the USPTO record
US 11,834,131	Rear derailleur In force Term ends Jul 21, 2042 · From the USPTO record	In force	Term ends Jul 21, 2042	From the USPTO record
US 11,814,132	Bicycle operating device In force Term ends Dec 20, 2042 · From the USPTO record	In force	Term ends Dec 20, 2042	From the USPTO record
US 11,891,155	Bicycle front derailleur In force Term ends Jan 25, 2043 · From the USPTO record	In force	Term ends Jan 25, 2043	From the USPTO record
US 12,409,911	Bicycle operating device In force Term ends Jul 13, 2044 · From the USPTO record	In force	Term ends Jul 13, 2044	From the USPTO record
US 12,623,752	Bicycle Sprocket Assembly In force Term ends Oct 21, 2044 · High confidence	In force	Term ends Oct 21, 2044	High confidence

Also on record, not counted in the 9: 1 lapsed for an unpaid fee · 1 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.

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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.

5 no status recorded

List them