Fujitsu Semiconductor Memory Solution Limited

13 patents currently held · Updated Nov 14, 2026

27 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 Ramxeed Limited (2025)

Ending by 2030

Dec 2026

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 Jan 14, 2027
The maintenance fee for Semiconductor Device and Test Method (US 9,081,050) comes due Jan 14, 2027. Unpaid by Jul 14, 2027, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

2 terms have 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 7,592,657	Semiconductor Device and Method of Manufacturing the Same In force Term ends Dec 7, 2026 · High confidence	In force	Term ends Dec 7, 2026	High confidence
US 7,392,947	Noncontact Tag, Control Method Therefor and Noncontact Id Identification System In force Term ends Dec 30, 2026 · High confidence	In force	Term ends Dec 30, 2026	High confidence
US 7,514,272	Method of Manufacturing Ferroelectric Memory Device In force Term ends Mar 13, 2027 · High confidence	In force	Term ends Mar 13, 2027	High confidence
US 7,547,629	Ferroelectric Capacitor and Its Manufacturing Method and Ferroelectric Memory Device In force Term ends Jun 14, 2027 · High confidence	In force	Term ends Jun 14, 2027	High confidence
US 7,577,012	Ferroelectric Memory Device, Method for Driving Ferroelectric Memory Device, Electronic Apparatus, and Method for Driving Electronic Apparatus In force Term ends Oct 28, 2027 · High confidence	In force	Term ends Oct 28, 2027	High confidence
US 7,893,735	Reset Circuit and System Having Reset Circuit In force Term ends Nov 26, 2027 · High confidence	In force	Term ends Nov 26, 2027	High confidence
US 7,633,831	Semiconductor Memory and Operating Method of Same In force Term ends Dec 31, 2027 · High confidence	In force	Term ends Dec 31, 2027	High confidence
US 7,746,718	Semiconductor Memory, Operating Method of Semiconductor Memory, Memory Controller, and System In force Term ends Jan 22, 2028 · High confidence	In force	Term ends Jan 22, 2028	High confidence
US 7,605,007	Semiconductor Device and Method of Manufacturing the Same In force Term ends May 10, 2028 · High confidence	In force	Term ends May 10, 2028	High confidence
US 7,659,758	Reset Circuit and System Having Reset Circuit In force Term ends May 23, 2028 · High confidence	In force	Term ends May 23, 2028	High confidence

10 of 13 patents shown.

Pro members see all 13.

Pro members: see all 13 patents

Also on record, not counted in the 13: 27 patents in force now held by others · 108 lapsed for an unpaid fee · 16 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

Every application published under this name has become a patent.